Teenage siblings Ezra and Hazell Klein, have a dark secret - they are serial killers. The dispute arises as Ezra struggles with his desire to be good and break free from their murderous ways, while Hazell is obsessed with murder and draws them deeper into their twisted world. As things get heated, and a new killer urges Hazell, Ezra and Hazell work together to expose whoever it is to the authorities, all while fighting their own madness.