A young thief (Ed Westwick) cases an architectural dream house in Malibu, not realizing it is the home of an eccentric female serial killer (Louise Linton). Catherine Black runs a successful hedge fund in Los Angeles. She is also a fashion-obsessed serial killer with a penchant for champagne, cocaine, excessive exercise, sex, expensive shoes, and indescribable violence. On the weekends she retreats from her penthouse office in a skyscraper downtown to her glass-and-steel architectural dream house in Malibu. On this particular weekend, she lures a young thief to her home. After falling passionately in love with her, he discovers her true nature.