Catherine Black, a wealthy and extremely intelligent corporate hedge fund manager and serial killer, has a high-fashion sense and spends her money on expensive cars, clothes, artwork, sports memorabilia, and furniture. She purposely lures Tyler Jones, a thief and
gamer who steals from elderly individuals, including Black's grandmother, to apply for a job as a house sitter at her large home in Malibu. As he cases the home, Black
roofies him to knock him out, and then gets her nails done. When Jones awakes, Black's girlfriend, Yu Yan arrives, and after feeding him the organs of a frat boy while mocking him in Mandarin, they engage in an evening of drugs, sex, and bonding. Black, after killing a man who was making suggestive faces at her in an
exercise session, comes home and orders Jones to leave her house. While she takes a shower he steals her car and jewelry. She analyzes the tracking device in Jones' car, calls him, and reads off the times and locations of recent thefts committed by him and his partner-in-crime, Chad. He brings the car and jewelry back in exchange for her not giving the Los Angeles police the incriminating evidence, but she explains that promises are meant to be broken. As they physically fight, and Jones runs from Black, he discovers her freezer full of human body parts, upping the stakes and forcing Black to vow to kill him even as it becomes obvious to both that they are madly in love. Relaxing after their final series of fights, in which Black could have killed Jones by any of several methods, they simultaneously agree to marry. Black begins taking medication to control her need to kill, and Jones gives up a life of crime, finishes engineering school, and pays back Black's grandmother and his other victims. They have become
vegans with Yu Yan joining them. The end credits show Catherine and Tyler happily raising a dog and three children. ==Cast==