I'm trying to find a fanfiction where Clint believes he will be left behind after he is captured as that was what the people he previously worked for did. However, he works for SHIELD now, so Phil comes and rescues him.
I'm pretty sure that Clint killed someone with his fingernail and he was found still strapped down on a table or something.
Thank you for any help you provide.
Through the Glass by dentalfloss
The specific part I'm talking about is in chapter 4