Randle McMurphy arrives on the psychiatric ward, transferred from a work farm after his aggressive behavior flagged him as a potential psychopath.

McMurphy bets the other patients that he can expose Nurse Ratched's vulnerability within one week.

McMurphy convinces Dr. Spivey to propose using the ward's unused room as a separate game room, overriding Ratched's objections.

McMurphy calls a vote to reschedule the ward's routine so patients can watch the baseball World Series; Ratched blocks the vote.

Ratched cuts power to the TV during the World Series; McMurphy sits staring at the blank screen and the other patients join him.

In a staff meeting, Ratched decides to keep McMurphy on the ward rather than transfer him, planning to expose him as a fraud.

After learning that Ratched controls his release date, McMurphy stops rebelling and begins carefully following the ward's rules.

McMurphy punches his hand through the nurse's station glass to retrieve a cigarette, apologizing and claiming the glass was invisible.

McMurphy organizes a fishing trip and convinces Dr. Spivey to drive after Ratched posts news clippings about ocean dangers to frighten the patients.

Ratched posts a financial summary showing McMurphy profited from gambling and the fishing trip while the patients lost money.

McMurphy defends patient George Sorenson during a forced sanitizing shower; Bromden joins the brawl against the aides.

Ratched sends McMurphy and Bromden for electroshock therapy after McMurphy refuses to apologize for fighting the aides.

McMurphy throws a late-night party on the ward, during which Billy Bibbit has sex with Candy Starr for the first time.

After Ratched threatens to tell Billy's mother about finding him with Candy, Billy dies by suicide.

McMurphy attacks Nurse Ratched, ripping open her uniform and attempting to strangle her before the medical staff pull him away.

McMurphy arrives at a psychiatric ward and immediately challenges head nurse Ratched, betting he can expose her vulnerability within a week. He organizes the patients around him, pushing for votes and privileges that Ratched blocks at every turn, until a dramatic sit-in in front of a blank television signals open war. Ratched outmaneuvers him by revealing she controls his release date, but McMurphy reverts to full defiance when he learns most patients are there by choice. He organizes a fishing trip, throws a late-night party, and fights an aide to defend a patient—each act raising the stakes higher. The party's aftermath ends in tragedy when Billy Bibbit dies by suicide, and McMurphy attacks Ratched in a desperate act of fury. Ratched retaliates with a lobotomy, and Bromden ends the story by smothering McMurphy as an act of mercy before breaking out of the hospital.

McMurphy's rebellion and fall in the ward.

Bromden hides in a closet to avoid being shaved by the aides, and Ratched forcibly medicates him when he panics.

McMurphy shakes Bromden's hand during introductions, undeterred by being told Bromden is deaf and mute.

At McMurphy's first group meeting, Ratched reads his criminal and military record aloud to undermine his standing with the other patients.

McMurphy wins a large pile of cigarette packs gambling, then lets all the other players win their packs back before bedtime.

The birthmarked nurse drops a pitcher after McMurphy flusters her, leaving Bromden and others unmedicated for the night.

Bromden hallucinates workers gutting chronic patient Blastic like a carcass underground; Blastic is found dead the following morning.

Bromden raises his hand during a second vote on the World Series; Ratched declares the meeting already closed before counting the vote.

Bromden wakes at night and looks out the window for the first time in years, watching a dog play happily and geese cross the moon.

Cheswick drowns himself in the pool after McMurphy stays silent rather than back up Cheswick's complaint during a group meeting.

Sefelt collapses with a seizure in the lunch line, and the incident reveals he gives his epilepsy medication to Fredrickson.

Harding's wife visits him at the library; the meeting is cold and strained as she mocks his friends and he corrects her grammar.

The fishing party boards the ship by sneaking past the captain after McMurphy distracts him with a false phone number.

On the drive back from the fishing trip, McMurphy arranges for Candy to return at two in the morning for Billy's promised date.

Ratched holds a group meeting without McMurphy and suggests to the patients that he is selfish and motivated only by profit.

Most patients close to McMurphy leave the ward or transfer to other wards in the days following his attack on Ratched.

Before and around McMurphy's rebellion, the ward hums with smaller moments that reveal just how total Ratched's control really is. Bromden's panic during a routine shaving, a flustered nurse dropping a pitcher, and a nighttime hallucination of machinery all show how deeply the ward has shaped its patients. Key relationships come into focus—McMurphy's unshakeable first impression on Bromden, Harding's cold reunion with his wife, and Cheswick's lonely death in the pool—each illuminating the costs of life under Ratched's regime. The fishing trip generates its own secondary drama when the boat captain blocks their boarding and McMurphy improvises a way past him. Back on the ward, Ratched strikes back by framing McMurphy as a selfish con man in a meeting held deliberately in his absence. After the final confrontation, the ward's fragile community dissolves as the patients who gathered around McMurphy quietly drift away.

The ward's daily life and its broken patients.

Harding warns McMurphy about electroshock therapy, persuading him to bet on subtle exposure of Ratched rather than direct confrontation.

McMurphy catches Bromden reacting to a whispered bedtime warning, confirming his suspicion that Bromden can hear.

McMurphy emerges from the shower wearing only a towel and drapes it over Ratched's shoulder, provoking a barely contained furious reaction.

McMurphy bets he can lift the heavy hydrotherapy control panel, fails to move it, then returns everyone's winnings saying he tried.

The pool lifeguard tells McMurphy that Ratched decides when committed patients go free, revealing there is no fixed release date.

Harding tells McMurphy that most acute patients, including himself and Billy, chose to stay and are not required by law to be there.

McMurphy gives Bromden a pack of gum, and Bromden speaks aloud for the first time, saying 'Thank you.'

Bromden refuses the aides' morning request to sweep the hallway, asserting himself publicly for the first time.

After hauling in fish on the open ocean, the entire boat crew joins McMurphy in an unrestrained shared burst of authentic laughter.

Bromden privately lifts the massive control panel in the tub room; McMurphy uses the feat to win a bet from the other patients.

Bromden and McMurphy are transferred to the Disturbed ward after defending George Sorenson in a fight with hospital aides.

Ratched sends McMurphy back for electroshock therapy three more times that week, but his defiant attitude remains completely unchanged.

Patients devise a plan for McMurphy to escape the hospital, but he delays his departure to throw a going-away party first.

Ratched returns to the ward after the attack, bruised, bandaged, and stripped of her voice.

Bromden smothers the lobotomized McMurphy as an act of mercy, then throws the control panel through the window and escapes into the night.

McMurphy's time on the ward is defined by a chain of pivotal discoveries and decisions that gradually shift the balance of power. Harding's warning about electroshock therapy steers McMurphy toward subtler tactics, yet small acts of defiance—catching Bromden's secret, draping a towel over Ratched's shoulder, failing to lift a panel but returning the money anyway—slowly awaken the other patients. The revelation that Ratched controls McMurphy's release date forces a temporary retreat, but Harding's confession that most patients are there by choice reignites his determination. These moments ripple outward and transform Bromden: he speaks his first words aloud, refuses a direct order, and lifts a panel no one thought he could move. Electroshock therapy fails to break either man, but the patients' plan to free McMurphy is delayed by one last party, sealing his fate. Bromden's final act—smothering McMurphy and hurling the control panel through the window—is both an ending and a beginning.