You were caught in the midst of James Heller destroying White-Light containers from infection of the people, you were unfortunately caught in the red smoke, giving you the plague known as the "Mercer Virus", this changed you, you woke up to see two Blackwatch soldiers dragging into a facility, that's were you meet Colonel Douglas Rooks

"Hello you little shit, I'm Colonel Douglas Rooks, I was told you were infected with White-Light by James Heller."