The plot centers on an encounter between on-the-run embezzler Marion Crane (Leigh) and shy motel proprietor Norman Bates (Perkins) and its aftermath, in which a private investigator (Balsam), Marion's lover Sam Loomis (Gavin), and her sister Lila (Miles) investigate her disappearance
Psycho was seen as a departure from Hitchcock's previous film North by Northwest, as it was filmed on a small budget in black-and-white by the crew of his television series Alfred Hitchcock Presents
Initially, the film divided critics due to its controversial subject matter, but audience interest and outstanding box-office returns prompted a major critical re-evaluation. Psycho was nominated for four Academy Awards, including Best Director for Alfred Hitchcock and Best Supporting Actress for Janet Leigh
Psycho is now considered one of Hitchcock's best films, and is arguably his most famous and influential work.
It has been hailed as a major work of cinematic art by international film critics and scholars who praise its slick direction, tense atmosphere, impressive camerawork, memorable score and iconic performances
Often ranked among the greatest films of all time, it set a new level of acceptability for violence, deviant behavior and sexuality in American films, and has been considered to be one of the earliest examples of the slasher film genre