Natasha and Clint had been missing for almost three months.
They'd been sent in undercover, and after some bad intel; they walked right into a trap.
Clint was captured first, and Natasha, refusing to leave her partner behind; went back in for him. That was the last shield had heard from them; their comms went offline, their trackers went dead and they seemingly disappeared...
Tony, Steve, Bruce and Thor had been sent to follow various leads over the months, while shield had teams all over the world searching for them, but nothing ever came from their efforts.
The council had all but given them up for dead and ordered Fury to stop searching.
Tony didn't give up though; he knew it'd have to be someone big for them to take out Hawkeye and Black Widow. Someone would want to take credit if they'd taken out two of The Avengers; they'd want to show off, brag. But no one was claiming responsibility, which made him think they were still alive, that something more was going on...
"Cap, I think I've got something"
"How sure are you?"
"Pretty sure"
"Where we going this time?"
"Argentina"
XxX
It was a small abandoned research facility just on the outskirts of Buenos Aries.
"You really think this is it?" Steve asked, he was doubtful; they'd searched twenty seven building just like this across twenty three countries over the past few months; some on shields recommendations, most from Tony's research, but they still had nothing. He knew Tony was desperate to find them, they all were; but uncertainty was playing on his mind
Tony nodded, determined
"We've come all this way... We might as well" Bruce offered from behind them
"I am in agreement" Thor stated. "Today may be the day we have our friends returned to us"
Steve nodded;
"Thor, you and I will take the basement and the first floor, Tony and Bruce take the top two floors; keeps comms open and be careful"
The door opened into a large, empty room; covered in dust, it was clear no one had been here in years. But they searched on anyway, hope forcing them to continue.
Little did they know in a small concealed room on the first floor there was a team of men watching their every move.
"Wait a minute; I want to see this" their boss told them, glaring at the men in the back who'd made a move towards the door.
"This could be interesting..."