A hostage negotiator is unable to continue with her job after a siege she tried to resolve ended in disaster and a man was killed.

Criminal psychologist Cameron Grainger is Detroit's go-to hostage negotiator. Blaming herself when a hostage crisis she's handling goes wrong and a young man is killed, she retires herself from service. But she is called back into sudden and terrifying action when her own sister becomes a hostage and the assailants-with a hidden agenda- demand that Cameron be the one to negotiate her release.