One cold November night when Kat Kominski was fifteen years old, she and some friends held up a convenience store. In the heat of the moment, one of the others shot and killed an off-duty cop moonlighting as a security guard. Kat and her pals fled the scene in a panic, and no one was caught. Sixteen years later, Kat --- now Kate White --- has built a new life for herself. Now a single mom with an eight-year-old son, she works as a prosecutor in the Philadelphia DA's office. But her dark past rears its head when she walks into court one day and has a devastating encounter with a prisoner, Mario Castellanos, one of her companions from that terrible night. Hardcore criminal Mario is facing a possible sentence of twenty years. He lets Kate know that he is counting on her, his old friend turned prosecutor, to make sure he goes free instead. If Kate doesn't do what he wants, he'll claim she was the one who killed the off-duty cop.