Having met on a train, a smooth-talking psychotic socialite shares his theory on how two complete strangers can get away with murder to an amateur tennis player — a theory he plans to test out.

A struggling actress tries to help a friend prove his innocence when he's accused of murdering the husband of a high-society entertainer.

24 Hour Psycho is the title of an art installation created by artist Douglas Gordon in 1993. The work consists entirely of an appropriation of Alfred Hitchcock's 1960 Psycho slowed down to approximately two frames a second, rather than the usual 24. As a result it lasts for exactly 24 hours, rather than the original 109 minutes. The film was an important work in Gordon's early career, and is said to introduce themes common to his work, such as "recognition and repetition, time and memory, complicity and duplicity, authorship and authenticity, darkness and light."