Patti Black is the most decorated cop in Chicago; a ghetto street officer, she redefines the word badass. But the steel-plated exterior she shows to the world - solitary, friendless, loveless - hides the hideous traumas of her past. When a serious of seemingly unrelated cases all point in her direction, she comes to the horrified realization that her past is no longer staying in its deeply suppressed place. It's back and hunting her down...