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. Thirteen years later, Kat - now Kate White - has built a new life for herself. Now a single mom with a nine-year-old son, she works as a prosecutor in the Philadelphia DA’s office. But her dark past returns to haunt her 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.