When Kat White was fifteen, she and some friends held up a store, and a security guard was killed. No one was caught. Sixteen years later, Kat (now Kate) is with the Philadelphia DA, and a single mom. She discovers that she is to prosecute Mario Castellanos, a friend from that terrible night. When Mario is found dead in her apartment, and another man who knows the secret gets involved, Kate finds that her life and her son's are in danger.