Backstory: One day while he was walking down the street, he felt something. It was as if he had gotten dizzy, but also like he was falling... then he looked up. The street around him was fading away, slowly he began to realize that the street wasn't fading, he was! Then everything went BLACK. A long story short, he had been "recruited" by a shadowy intelligence agency. They turned him into a cold hearted killer. They taught him how to kill silently, and then dissapear. They also gave him an implant to open and close rifts to hunt down the target, wherever he might be. He has been sent here to ellimanate someone: Jack Jack had long ago escaped that world know as Sierra, but they still want him dead. Also Rift doesn't know (yet) that his brother has turned into the fighter Bars...
