One flew over the cuckoo`s nest

One Flew Over the Cuckoo's Nest is a 1975 American psychological comedy drama film directed by Miloš Forman, based on the 1962 novel of the same name by Ken Kesey. In 1963, Randle McMurphy is on an Oregon work farm for the statutory rape of a 15-year-old girl. He pretends to be mentally insane in order to get himself transferred to a mental institution and avoid hard labor. The ward is dominated by head nurse Mildred Ratched, a cold, passive-aggressive tyrant who intimidates her patients.
The other patients include young, anxious, stuttering Billy Bibbit; Charlie Cheswick, who is prone to temper tantrums; delusional, child-like Martini; the articulate, repressed homosexual Dale Harding; belligerent and profane Max Taber; epileptics Jim Sefelt and Bruce Fredrickson; quiet but violent-minded Scanlon; tall, deaf-mute Native American "Chief" Bromden; and several others with chronic conditions. Ratched sees McMurphy's lively, rebellious presence as a threat to her authority, which she responds to by confiscating and rationing the patients' cigarettes and suspending their card-playing privileges. McMurphy finds himself in a battle of wills against Ratched. He steals a school bus, escaping with several patients to go fishing on the Pacific Coast and encouraging them to discover their own abilities and find self-confidence.After an orderly tells him that the judge's sentence does not apply to people who are deemed to be criminally insane, McMurphy makes plans to escape, encouraging Chief Bromden to throw a hydrotherapy console through a window. It is also revealed that McMurphy, Chief, and Taber are the only non-chronic patients involuntarily committed to the institution; the rest of them are self-committed and could leave at any time, but are too afraid to do so. After Cheswick bursts into a fit and demands his cigarettes, which had been rationed by Ratched, McMurphy fights with the orderlies, and Chief intervenes.
Ratched sends Chief, Cheswick, and McMurphy to the "shock shop" as a result of this insubordination. While awaiting their punishment, McMurphy offers Chief a stick of gum, and discovers he can speak and hear, having feigned his deaf-muteness to avoid engaging with anyone. After being subjected to electroconvulsive therapy, McMurphy returns to the ward pretending to be brain damaged, but then reveals that the treatment has made him even more determined to defeat Ratched. McMurphy and Chief make plans to escape, but decide to throw a secret Christmas party for their friends after Ratched and the orderlies leave for the night.