When HYDRA came out of the shadows I was on a mission, nothing too taxing but one of the other field agents was a HYDRA agent and they turned on us. I barely got away with my life, the other members of the team weren't so lucky, and I made my way to a safe house. The location of that safe house was given to HYDRA by Bobbi Morse and as a result I was captured and taken to Daniel Whitehall who then with the help of his second Sunil Bakshi brainwashed me into serving HYDRA. I resisted for as long as I could but I'm only human and eventually I succumbed.
I was then used for a mission against Phil Coulson and his team, with the use of a photostatic veil I infiltrated his team and tried to sabotage their plane while attempting to retrieve an artifact that Whitehall was after. I failed and was discovered. Agent Melinda May and I fought and fused the veil to my face permanently and was left to HYDRA. After that I served Whitehall almost exclusively. All the while during the Bobbi Morse knew where I was and what had been done to me as she was working undercover within HYDRA as their head of security but not once did she try and help me in anyway.
After Whitehall died I was in a state of confusion, the brainwashing they used meant I was completely loyal to Whitehall and his death left me unable to do anything. With Grant Ward's help I managed to break the brainwashing and he even found someone to fix the veil on my face so that I no longer had to walk around scarred and wearing Melinda May's.
During the course of helping me get back my identity we liberated Sunil Bakshi from government custody. We brainwashed him and discovered that it was Bobbi Morse who had given away the location of the safe house I was in during the fall.
When Grant was brought into help Coulson infiltrate HYDRA and rescue some captured enhanced people I was left at their base, it was here where Bobbi Morse came to speak to me and acted as if she had never seen me or been aware of my treatment at the hands of HYDRA but I know this to be a lie as we both worked under Sunil Bakshi so she would have been aware of me given her position for them. I believe she was trying to ascertain if I was aware of what she had done.
I think that's everything but forgive me if I've forgotten to include any details.