"The Deep End" is a 2001 film directed by Scott McGehee and David Siegel. It stars Tilda Swinton as a mother named Margaret who becomes entangled in a web of deception and danger when she discovers her son is involved with a man who has a dark past. The film explores themes of motherhood, morality, and the lengths one will go to protect their family. Set in Lake Tahoe, the story unfolds as Margaret tries to cover up a crime to shield her son from the consequences. The film is a psychological thriller that delves into the complexities of human relationships and the choices that define them.