One Flew Over the Cuckoo's Nest (1975)

A misbehaved con named McMurphy (Jack Nicholson), who shirks authority, finds himself in an asylum after faking insanity to get out of work detail in prison. The troublemaker soon finds himself in a place that's worse than prison when he meets Nurse Ratched (Louise Fletcher), whose set of rules and regulations are meant to suppress patients' psychotic outbursts, and their spirits. It's not long before McMurphy is reaching out to his new inmates, trying desperately to bring life to an otherwise dead atmosphere and pit them against the dictatorship of Ratched, who thinks McMurphy's free spirit is as dangerous as a schizophrenic impulse.