Mara, a single mother working as a firefighter, believes she has found safety with charming teacher Arthur. Behind his flawless image lies a ruthless killer who profited from the deaths of his former wives. After Arthur harms Mara's daughter, Mae, Mara uncovers the truth and sends him to prison. A decade later, his revenge puts Mae in danger again, forcing Mara into one final fight against the man who destroyed their lives.