Tony kidnapped by Ross
I'm looking for a specific fic where pre-Civil War, Ross captures Tony and keeps him in the Raft(?) where he is then tortured. Steve comes to the Raft to go and rescue the other Avengers like he did at the end of the movie, but doesn't realise that Tony is secretly being kept somewhere else in the Raft. He comes back when he finds out, and manages to save Tony. Does anyone know this fic???