Helena, a woman living a seemingly ordinary life, hides a dark secret—her father is the infamous 'Marsh King', the man who kept her and her mother captive in the wilderness for years. After a lifetime of trying to escape her past, Helena is forced to face her demons when her father unexpectedly escapes from prison.

Rachel is a divorced single mother whose bad day gets even worse. She's running late to drop her son off at school when she honks her horn impatiently at a fellow driver during rush-hour traffic. After an exchange of words, she soon realizes that the mysterious man is following her and her young son in his truck. A case of road rage quickly escalates, at horrifyingly psychotic proportions, into full-blown terror as Rachel discovers the psychopath's sinister plan for revenge. He is single-mindedly determined to teach her a deadly lesson.