Set in an unnamed Oregon town in 1963, the action of the film takes place in the town’s mental institution. The opening scene shows the admitting of 38-year-old Randle Mc Murphy (Jack Nicholson), a criminal serving time for statutory rape of a minor due to insanity, which, the viewer quickly realizes, is faked by him in order to avoid a longer jail sentence. The doctor in charge is not convinced and he commits him to one of the wards for observation till the insanity is proved or disproved. His fellow patients in the ward include Billy Bibbit (Brad Dourif), a 30-year-old stammering, suicidal, nervous wreck who has a deathly fear of his mother, Charlie Cheswick (Sydney Lassik), a timid man