Disclaimer: Let's face it. I don't own Justice League or any characters and places that have remotely anything to do with it. DC Comics does. I also don't own I Am Legend, which basically belongs to the guy who wrote the book. But I do own the plot of this story! :D

Prologue: Virus

"The virus is spreading," Mr. Terrific said in a tense voice, frowning at the computer screen before him. "These news reports say that more and more people are…" He swallowed, hardly able to say the horrible word, "…mutating."

I felt a shiver run through me at his words, which could mean the end of Earth as all of us knew it. It had already meant the closing down of the Watchtower until further notice, and we hadn't been on missions off-world in months. All of the League members that were actually still alive were holed up in Metro Tower. And that wasn't very many. B'Wana Beast, Fire, Atom, Dr. Light, Vigilante, Booster Gold, Steel, Stargirl, and so many others had already died, infected with the virus. I didn't even want to think about…Linda.

I had helped throw their bodies into the fire pit in Metropolis myself, so they would actually stay dead.

"What can we do?" Superman asked in a tired voice. We were all tired these days, even the Boy Scout. Because of that virus, the one that had been supposed to cure cancer.

The woman who had created it had been all over the news shows in the beginning, praised for her amazing accomplishment as more and more cured people walked out of the hospitals. But then the virus had become airborne. All the people around the world had started changing, acting weird. No one had known what was going on until it was far too late for anything to be done.

"I don't think that there's anything else we can do," Mr. T. said in a solemn voice. He rubbed his forehead, which was free of his painted-on mask. None of us really bothered with concealing our identities anymore, trying to focus on saving Earth instead. He closed his eyes, probably fighting back memories. He'd lost both his wife and daughter in the epidemic. His wife had gotten far enough along to become one of the people afraid to go into the light.

"There must be something," J'onn began softly. "Flash and Shayera both have blood that is immune to the disease, as we have discovered with our tests. Exposure to the virus takes away most of Flash's abilities, but it doesn't harm him. The same with Shayera. If we can just get their blood made into a cure of some sort-"

"We have to do something!" Supes slammed his mighty fist into the computer's keyboard, sending sparks flying everywhere. We all flinched away from him, seeing the fire burning in his angry eyes. He had lost Lois Lane, his fiancée, when she had become infected, along with so many others. That didn't help him control his temper very well, as he was having emotional problems now. "We can't just stand here and do nothing, hiding here in the Metro Tower and waiting to die!"

"We don't know what's going to happen now, Clark," Diana said soothingly, laying a comforting hand on his shoulder. I saw her blinking back tears from her eyes, probably thinking about Batman. He had died just over a week ago; I didn't let myself think about it, that fact that Bats was dead. None of us ever pictured the way he had looked, eyes glazed over, skin turning to grayish-white.

He had looked like a living corpse, which was pretty much what he had been.

"Maybe the virus will just blow over, stop where it is now," Ollie suggested, though his tone showed that he doubted it. It was bitter and full of pain. Black Canary was in the Metro Tower's infirmary. It was painfully obvious from her shallow breathing and sallow skin that she was infected.

"If you believe that, you're insane," GL growled. "Why else are we forbidden from leaving this place now? Why haven't we seen any new reports on TV? Why haven't we been getting any calls? Everyone out there is probably dead by now!"

It had been over a week since the last call from someone. I was starting to agree with him. Was everyone out there dead? Were we here in the Metro Tower the last people left alive? I closed my eyes, imagining us all slowly dying, trapped inside this coffin of a building.

My breath hitched, and Shayera put one arm around me. She was all I had right now, my big sister. GL was too caught up in this horrible virus, not caring about anyone around him. He had become an emotionless robot of the best friend I had once known. "It's going to be okay, Wally," Shayera whispered into my ear, squeezing my hand with one of hers.

A shrill scream of terror suddenly rang out through the building, and all of us jumped in shock. I spun towards the doorway, and saw Kara stumble into the control room, light blue eyes wide with horror.

Supes was at his cousin's side in an instant, gripping her shoulders. "Kara, what is it? What's wrong?"

"Outside," she mumbled, body drooping and eyelids fluttering as though she might faint. "They're all…they're all…" She shook her head numbly, blond hair flipping against her face.

"Who's outside? Kara, who?" Superman demanded, shaking her. The loss of Lois had made him less in control of himself. He didn't even seem to realize that he could be hurting her.

I pulled away from Shayera and ran over to them with what speed I had left. I jerked her away from him. Her whole body was shaking. She wrapped her arms around me and buried her head against my chest. I let her, though it made pain shoot through me. Her touch reminded me so much of Linda. We had been about to get married, then...

"Kara, answer me!" Clark was beyond angry, eyes narrowed into slits.

"Clark, don't-" Shayera began worriedly.

Kara started sobbing, lifting her face from my chest. "Everyone," she choked out brokenly.

Diana soared out of the room, towards the front entrance. GL, Superman, Shayera, Mr. Terrific, Ollie, and J'onn ran after her. I carefully scooped Kara up into my arms and sped in the direction that they had gone. She clung to me, soaking the front of my costume with her tears.

"Hera," Diana gasped out as she looked through the front window. Her voice was broken and tortured.

"Oh my…" Shayera's voice trailed off into nothingness.

I shoved through to be able to see myself. And I saw that Kara had been right about 'everyone' being out there. Hundred of people gathered in front of the Metrotower, illuminated in the darkness by a few streetlights. Their skin was white and full of pulsing blue veins. They were all bald, gaunt, and wearing shredded clothing. One stood before them all, breathing heavily and lips clenched together tightly. All the others were screaming and shrieking, the sound chilling my blood. Among the horrifying creatures lurked thin animals that could have once been dogs. Their eyes were red, and their jaws were dripping slime. Several people held them back with ragged collars.

"What are those things?" Ice blurted from behind me, voice shaking.

"The people." Green Arrow sounded numb.

I couldn't figure out what he meant; those things weren't people. They had to be a race of aliens attacking our planet. Then I could see it, too, in an instant. Those who had been dying these past months, they had resembled the creatures out front. Only they had still looked human. These were further along in the infection. In the weeks since we had been out of the Metrotower, everyone out there had transformed into those…things.

"We might be able to cure them," J'onn said thickly, always trying to sound hopeful but failing miserably.

"But what if everyone out there looks like this? What are we going to-" John began.

The leader of the pack roared wordlessly, and all the monstrous dogs were released. They bounced forward, throwing themselves against the outside of the building. Several people screamed, and I tripped over my own feet as I stumbled backwards. Kara scrambled from my arms and ran further in, to who knows where.

"What the-" GL broke off when the mutated people did the same as the dogs had, charging forward. They began attacking the building with a vengeance, clawing at it and screaming the whole time. The whole place started shaking, and cracks formed in the glass windows.

"They're going to get in!" someone screamed.

"What in Hera's name do they want?" Diana cried, flinging an arm across her face to protect it from the flying glass.

I already knew. To kill us. Because we were living, and they were dead. I bit back the hopeless sobs that threatened to overflow from my lips. We were all going to be killed by those things outside. We were going to die, and we would never be able to cure everyone with mine and Shayera's blood like we had hoped.

Mr. Terrific ran over to me as they started to kick in the door. Each blow made a sound like thunder, and it was starting to cave in. I tore my eyes from the death outside and looked up as he started speaking. "Wally, get out of here. Now. Take Shayera with you and get as far away as you can. There are too many of them."

"What? Those things are trying to kill us. I can't just abandon you guys-"

"You have to. You two are our only hope." He glanced over his shoulder as the window exploded inward, spraying everyone with a coating of shattered glass. He spoke even more urgently now, trying to get the words out. "If they get their hands on you, everyone is going to remain like that forever! Run as far as you can, and find a cure!"

I leapt to my feet as the creatures started pouring in. They pounced on several of my teammates before they could make a sound, snapping their necks or tearing open their flesh. I heard a whimper over the sounds of battle, and realized that it had come from me.

"Go! Now!" Mr. Terrific shoved me and raced back towards the battle.

I watched for a few seconds more, torn, as the infected people of Metropolis attacked my friends and teammates. Something inside of me was urging me to go help them, to fight off those zombie creatures and make sure that all of us survived, no matter what.

But Mr. T. was right. Shayera and I were the world's only hope. If we died, so would the rest of the planet. The virus would take over completely, destroying the last of the human civilization. Everyone who was dying here tonight would have died in vain.

I gritted my teeth and ran towards Shayera at the fastest speed I could manage, which wasn't very fast compared to what I was used to. One of the crazed canines, teeth bared and saliva flying in all directions, jumped towards me. I kicked it in the snout, feeling its jaws snap at my boot. I ignored the twinge of guilt I felt for kicking the animal; it was out of its mind and trying to kill me. I had no choice.

I finally reached Shayera, after what seemed to me like an eternity. She was slamming her mace into a zombie monster. Or whatever it was, anyway. She pulled her weapon back again and again, crashing it with deadly force into her attacker with each swing. More and more came racing towards us, and she kept hitting them all away.

"Shayera! We have to get out of here! We're immune to the virus, and we can try to find a cure!" I panted, kicking a once-human in the neck as he clawed angrily at me. "If we die, everyone else is doomed!"

"Get out of here, Wally!" she screamed at me over the sounds of our friends' dying cries and the endless shrieks of the infected who were killing them. "I'm not going to leave; I'm going to stay and fight! Get as far away as you can! Run!" A breath whooshed from her lips as she whirled her mace into two more creatures.

"No! I…I can't leave you!" The thought horrified me. If I lost my big sister too, I would have lost just about everyone that I cared about. Everyone.

She turned to face me, eyes narrowed into emerald slits of determination. "You have to," she hissed at me. "I'll be fine. Just go." Her wings arched out from her back to add to her urgency.

I didn't want to, but I knew that I had to. I forced myself to turn away from her, and ordered my feet to run. I left the Metrotower as fast as I could, the horrifying sounds slowly fading away into the background.

So, any good? What do you think? Remember, reviews=a girl's best friend! :D