The Tesseract is a 2003 thriller film directed by Oxide Pang and starring Jonathan Rhys-Meyers.

The film examines four seemingly unconnected lives brought together through a theft in a Bangkok hotel room (unlike the novel which is set in Manila).

The interactions of an English drug dealer, an English psychologist, a Thai assassin, and an abused 13-year-old boy demonstrate that life is so complex that even the smallest events can have enormous, even fatal consequences (i.e. the butterfly effect).

Sean, a runner for a drug gang, has checked into room 303 at the seedy, rundown Heaven Hotel in Bangkok, to await arrival of a package of heroin.

Another guest is Rosa, psychologist who is researching slum children, on the floor below (room 202).