I'm searching this fic I read one or two months ago. I'm not sure if it was on ff.net or AO3 and if the story was complete or wip.
The Avengers are attending a gala/charity event/whatever and Tony meet a person of his past. This man is making him very uncomfortable and when the two of them go alone out on the balcony the team is worried and follow.
The man here attemp to abuse tony while making him remember how he had abused him years ago in the library of some mansion while recording all with the security cameras (the man is the son/owner of the security group that works at events like this) and he has done this with others and then blackmailed them (I think)
I remeber Clint climbing the wall outside and using an arrow with a mic to listen on the conversation
When the man start beating tony against the wall and trying to undress him, the team finally step in and stop the man.
While tony is recovering, the avengers search the video surveillance videos stored in a secret hd for evidence and then find the video where a young tony is being abused.
Thank you all for you help