This is set in season 7 of supernatural and at the beginning of season 2 of the walking dead.
Sam is tn the mental hospital with hallucinations of Satan. daryl faves him and looks after him. Castiel saved Sophia.

This is my first story so take it easy on me. It propaply won't be any good because I don't really ever read things. Read at your own risk

The group was settled in at the Hershel's farm now, and for the time being
was more or less in safety. Carl was still recovering, but that was not
the pressing issue as far as Daryl Dixon was concerned. There was a
little girl still out there, lost and alone and waiting around wasn't
going to help her. He had started out searching the woods but this slow
paced method wasn't doing her any favors either. The plan he had finally
come up with was too risky to even consider and yet there he was
sitting on his bike seriously considering it. The best case scenario was
that he would be separated from the rest of the group, the more likely
outcome was that he would get surrounded and and killed.

He slid his right foot back and forth on the ground slowly making a
deep groove in the soil. He didn't notice the pair of eyes staring at
him. He didn't even notice the footsteps approaching his bike. "Whatcha
thinkin about," A soft female voice asked. The words pulled him out of
his deep thoughts back to reality where Carol was standing over him. He
pulled his forehead off the handlebars where it laid meeting his eyes
with hers.
"You worryin?...yi know, bout yer girl, He asked to avoiding answering her question"
A
grief filled anger came across her face at the mention of it. "I just
don't understand why nobody is out looking for her!" The word's struck
Daryl with sting. Why wasn't he back out there. Was he really putting
his own safety above that little girls? Was he such a coward? He meant
to tell her that things would be alright and that he wasn't done
searching, not even close. But the sting of his own guilt pushed passed
his lips instead. "Why aint you out lookin for her!
Carol's
look softened into sadness. "I would get killed if I tried to go out
there alone" "Yer her mother, yer supposed to die if for her sake!"
Daryl did not soften his tone to match her's but rather intensified it.
"If you had kept tabs on your girl she wouldn't be lost!" Carol's face
broke , All the mournful sorrow she had tried to back suddenly became
visible is her eyes, and tears streamed down her face. "Stop yer crying"
he commanded abruptly, which almost shocking her enough to actually
stop the tears. "I'm gonna find yer little girl, I have a plan" Her eyes
brightened just a little.. "Great, then I'll go with you."
"No!... don't need yer help, It's a one man operation. Sides it's too dangerous, you'd only be in the way.
Daryl left as soon as the sun was beginning to break the horizon the next morning.
Carol knew as soon as she heard the noise, she was never going to see Daryl again.

Daryl
had driven out to the stretch of road where they had lost Sophea,
parked his bike and laid full force on the horn. There was no going
back. The horn blared loudly serving two purposes. The first was to let
Sophia know which way the road was. and the more important was to get
any walkers off of her trail, actually give her a fighting chance. But
for Daryl there was no fighting chance anymore. He could not return back
to the farm after the noise he was making. Instead he had to go to back
the nearest city, back to where all the walkers were coming from.
He
held out as long as he could, 12 minutes, he had been hoping to wait
for longer, but there was no choice. The walkers would have him
completely surrounded if he waited any longer. He gave his motorcycle a
couple of good revs which was almost louder than the horn and sped off.
He was beginning to wish that he had done this in a closed car rather
than his brothers bike. But he knew full well that whatever vehicle he
took, they likely weren't getting back. He swerved from side to side
narrowly dodging the hands reaching toward him. One actually managed to
grab ahold of his side, Scratching and tearing at his leather vest. It
may have pulled him right off his bike, but it got tripped over by
another Walker and lost it's grip. He swerved right to get more room and
kept on course. He finally got to a good stretch of road without cars
or too many walkers and was able to pick up speed.

The
moment he got into the city he ditched his bike. It was too loud to be
practical. He left it running in the street. It would at least serve as
distraction. He hurried down an alley, one walker stumbled past him not
even realizing he was there so focused on the noise. He could see more
up ahead though, and he wouldn't get so lucky more than once.
He
began frantically trying door knobs in the alleyway hoping to get into a
building. They were closing in fast. He raised his crossbow but he
knew too well there were two many to take down that way. He pulled his
gun still instead still walking toward them. The forthe door handle he
tried turned. A sigh of relief passed through him.

As
Daryl entered the building and the door slid shut behind him, blackness
filled the room. He reached into his back pocket and took out a metal
lighter. With a flick the room lit ever so faintly. He could hear
walkers in the building, not close enough to be an immediate concern .
He waited what felt like an eternity with his back pressed against the
metal door before his eyes adjusted to the dim light. This seemed to be
the employee entrance for a medical facility. lockers lined the walls
for employee's personal were secure locks that used key
cards on the door in front of him. though it had already been broken
open by walkers. He peeked through the doorway into the wall to assess
the walker situation. He couldn't see any but he could hear them in the
building. He closed his eyes tight and listened closely to tell where
the noise was coming from. His eyes sprung open again in surprise. He
could hear a low voice chanting underneath the clatter and moaning of
the walkers. He cautiously snuck down to the end of the hall, peeking
his head around the corner. He could see them, maybe 6 walkers crowded
around the secure door to room 114. On the other side he could hear the
voice now much more clearly. "Exorcizamus te, omnis immundus spiritus,
omnis satanica potestas, omnis incursio, infernalis adversarii, omnis
legio," It was some foreign language but the voice was definitely
praying. He didn't blame the sorry son of a bitch. He might be praying
too if he was in that hopeless situation. There was no way that Daril
could take down 6 of those things without making any noise. He would
have to find another way. He went back to the door he had come in.
pressing his ear against it. He could still hear his brothers bike
running, He waited several more minutes than readied his cross bow. He
pushed open the door just enough to peek out. It was clear. they had
gone to investigate the bike as he had hoped. He pushed on the door and
made a mad dash to the the corner of the building. He slid around the
corner and counted three windows making sure that he was at the right
room. "Shit" he whispered to himself.
The
inside of the window was covered with an aluminum shitter. It occored
to him that this side if the building must have been the mental ward.
Still as much of an obstacle as the metal shutter was now, it had
probably been the only thing keeping that poor son of a bitch alive
until this point. Daryl didn't have any tools, all he had was a knife.
It might work if he had enough time though. He slid the knife around the
edge of the window attempting to loosen the entire pane of glass. He
worked at this for almost 10 minutes and was pretty sure that he was
almost through the wood. He slid the knife into the groove he had made
and began to pry this time, He could feel it trying to give, He pushed
harder and the corner began to lift.
"AAAAAAAAAAAAAAAAAAAHHHHHHH!"
A scream had come from the other side of the window. The noise
startled Daryl and with a wrong move the knife snapped into the pieces,
the blade and the handle it was meant to fold into to.
"AAAAAAAAAAHHHHHH" The noise sounded again. "Damn it" Daryl thought out
loud, "The walkers must've gotten through the door." There was no time
now. Even out there, walkers were starting to draw closer. With one last
attempt to save the man Daryl put his foot through the glass of the
window. With three more kicks he had gotten through the metal shutters
too. He pulled off his leather vest and laid it over the the jagged
bottom edge of the window. He put one hand against the side of the
window for support and reached the other into the room along with his
head and shoulder. To his shock there were no walkers in the room. In
fact the the tall man was leaned on the door, as far toward
the walkers as he could possibly get. One was reaching through the
small broken window on the door almost touching the man crouched at the
bottom. "Come on!" Daryl ordered in a hasteful voice. Daryl could hear
the walkers surrounding him outside. He didn't bother looking, it would
just be a waste of precious seconds at this point. "I said come now or
die here!" He was now yelling at the man. Daryl realized now that
breaking the window, though of good intent, was going to kill both of
them. He pulled finally back out of the window, And just in time. he
shot a walker in the head just before it lunged on him. However he'd had
no time to prepare his crossbow and Had used his gun instead. He knew
that he had made the situation that much worse. As he looked around he
could see that he was boxed in. There were about 16 of them in total.
Suddenly the 6 that were inside didn't seem so bad. And he jumped down
into the room. He aimed over the mans head and shot two if the walkers
on the other side of the door. He grabbed the man by the caller of his
shirt and pulled him up to his feet. With another bang he shot the lock
of the door and let them start pouring in. Bang! Bang! Bag! Bang! Click!
Click! He had assumed that there were still six out there and budgeted
his rounds accordingly, Unfortunately there were now 7. He pulled out
his crossbow but the thing was already on top of him. He was trying to
hold it back but there was little he could do about the thing trying to
claw at him. Suddenly the thing lifted off of him. His new friend had
taken hold of the thing and was now slamming it against the metal door
as hard as he could doing more than enough damage to it's head. The man
looked unwell and slightly confused. Daryl instinctively grabbed his
wrist and pulled him along after him. "The safest place seems to be the
rooftops, "Daryl said unsure how much the man was picking up, by the
look on his face on his face, not too much. " They don't have a whole
lot of reason to notice us up there.I don't think they can climb well
either"

Sam
followed the man fairly certain that it was not lucifer. In fact he was
increasingly certain that it was Dean hiding behind Satans face. He was
trying to keep up, but it had been 4 days since he had slept and too
long since he'd had food or water. "Dean please slow down." Sam's voice
was dry, and weak, and hoarse from screaming. He made another attempt to
be heard. "Dean! slow down, I can't keep up. Satan pulled harder on his
wrist. "We stop, we die" he responded.

Daryl was pretty sure that he had just been called Dean and wondered
just how with it this guy was, He was in the mental ward after all.
Still there was no time to stop no matter how bad of shape this guy
looked. Three more flights of stairs and they were finally on the roof.
It was clear. For the moment they were safe. The rumble of the
motorcycle still in the distance. Sam rested his back against the door
they had just come through. "What do we do now Dean?" Daryl looked over.
He handed him a bottle of water he'd had in a bag. My name isn't Dean,
It's Daryl. Sam almost spit out the drink he had just taken but his lips
were too grateful for the cool liquid and wouldn't allow it. "What?
You're not my brother Dean?" "No, why would you think I'm your brother?
Are you seeing things?" Sam slowly nodded. It's not something he wanted
to admit, but not doing so would put them both in danger. Daryl leaned
his face close to Sam's so sam could get a better look at him "So right
now, When you look at me you see your brothers face?,
"Um
not exactly, Sam knitted his brow, "All cards on the table, I'm
hallucinating that your Satan. I just assumed you were my brother,
seeing as you almost died to save my life. Daryl squinted his eyes, "You
think I'm Satan?" "No, sam quickly corrected, "I know you're are not
Satan, I'm well aware that I hallucinate" "How often do you
hallucinate?"
" Sam gave a deep sigh "I never stop hallucinating."
Daryl
started wondering just what he had gotten himself into. No even if he
had known how dangerous it would be, he couldn't in good conscience have
left him there. Besides if someone had to get stuck with looking after
this lunatic, it should be someone capable. "So, You know my name now,
What's yours friend.
"It's Sam, Sam Winchester"