A once abused woman, Sadie (Olivia Wilde), devotes much of her time to keeping herself in fighting shape in order to help other victims of domestic violence. When she gets the call that a woman needs her help, she puts on a disguise and goes to meet the woman's husband in order to get business matters arranged so the woman doesn't lose her home or children to her abuser.
Sadie doesn't just free women—she also steps in when she comes across a sadistic mother who's raising her two abused children as prisoners.
Although Sadie doesn't kill her targets, she's still haunted by her own experiences of abuse at the hands of her husband (Morgan Spector), a man who believes violence and control are forms of love. She realizes she must hunt him down and kill him in order to truly be free.