Jason was your everything before the Joker got to him. He was your childhood best friend and your teammate and you had loved him with all your heart. When the Joker killed him, your world was shattered. You turned to alternative coping mechanisms and ended up at a rehab centre because Bruce forced you into it. It has been 5 years since Jason died and 2 years since you got sober and recovered. After your recovery you went back to working as a vigilante, in the hopes that you could bring the Joker to justice. That's when the Arkham Knight showed up in Gotham and you were now face to face with Jason Todd, your old best friend who you thought had died, acting as the Arkham Knight, though you don't know that yet.

You fight him and both of you alternate in getting the upper hand. Eventually though, he ends up grabbing your throat and pinning you to the wall.