Clint and Natasha were both taken up to the medical wing on returning from their latest mission.

It had all gone to plan, up until the last minute:
When the two of them were fleeing the building after taking out their mark; a shot was fired by a guy both had thought was dead. It hit Clint in the chest; he was wearing Kevlar and it just cracked a few ribs, but the force of the shot caused him to slam to the ground.

At the distraction of Clint going down; Natasha turned to check on her partner and missed the guy sneaking up behind her. He managed to aim a forceful kick to her temple before she fought back; bringing her knee up between his legs and elbowing sharply to his side. Natasha saw Clint getting up from where he lay and draw his bow. More shots were fired but all missed their marks.
The sniper was now dead, an arrow protruding from his neck and Clint turned ready to fire at the man who was fighting Natasha.
Before he could fire; the man grabbed Natasha's arm, twisting it harshly and snapped her wrist. He wrapped his other arm around her neck, pulling her close to his body, and positioned her between himself and Clint. Clint froze, arrow drawn, but no way to strike the man without hitting Natasha.
Noone moved, they stood frozen, and then the building collapsed around them...

They both had concussions, Clint had several cracked ribs and Natasha had a broken wrist and a black eye, the bruise extended down her jaw line; covering the left side of her face. Both knew it could have been much worse.

When Fury entered the medical bay and exclaimed; "Oh good! You're injured! That's perfect"
The two assassins looked at each other; half expecting it to be the concussion which made them hear that.

"We've got another mission for you"

"But we just got back"

"I know, but while you're injured it makes sense"

They looked to each other again, sure they were mishearing him.

"Get cleared from medical and then meet me in the conference room. You have 10 minutes agents"

The two agents wondered down the hallway thoroughly unimpressed by Fury's rush to get them back into the field. They just both wanted to go home, get some sleep, and have a shower.

"Okay here's the mission parameters; Jared Winston is a NYC Police Officer. He's been investigated on numerous occasions for drug trafficking but we've never had any cause to bring him in. The latest batch of drugs he's been providing have resulted in at least seven deaths, and we have intel to suggest he now has plans to use this batch to poison certain members of the public"

"Who exactly is he planning on murdering?"

"Intel implies he's targeting certain members of law enforcement and political figures"

"What's the plan?"

"We need evidence on this guy in order to take him down. His wife; Lindsay has been on the safeguarding list against domestic violence for years, the couple are known to social services but she refuses to testify. She attends a domestic violence support group once a week and we need you to convince her to give evidence. If we can get him in on that we should be able to get something on his drug trafficking activities and prevent any further deaths"

"You want Nat to go to the support group to make contact?"

"Yes. Natasha your alias is Poppy Monroe, your husband is George Monroe, an ex con, drug addict and all round low-life. You'll go the meeting tomorrow night, on the run from your husband who you believe to still be in Boston. Make contact, try and get some information. Barton will be watching you from across the street"

"That's it? Gain her trust, get some info and convince her to give evidence?"

"That's it for now. Both of you go get some rest; mission starts tomorrow"