The Night Evelyn Came Out of the Grave

Alan, a wealthy aristocrat, has just been released from a mental institution following his wife's death. He mourns Evelyn and his fragile state sets the stage for his later obsessively cruel behavior. He returns to his mansion, already displaying a thirst for revenge.

In his grief, Alan lures red-haired strippers and prostitutes to his home, where he tortures and kills them as a way to cope with his loss. These killings reveal his unrestrained psychosis and set the film's dark tone. His mansion becomes a crime scene of his own making.

Alan attends a séance and the medium contacts Evelyn from beyond the grave, causing him to faint. The experience deepens his paranoia and drives his subsequent actions. The séance foreshadows Evelyn's lingering influence.

George Harriman, Alan's cousin and heir, offers to move into the mansion to care for him. His arrival introduces a calculating influence behind the scenes. The two form an uneasy alliance as Alan's guard against his own instability weakens.

George takes Alan to a strip club, and Alan brings home Susan, a dancer who escapes. Susan disappears afterward. The episode signals the dangerous underlying manipulation around the household.

George suggests replacing Evelyn with a new bride resembling her as a cure; the plan leads Alan to move to London to begin anew. The scheme marks the start of impersonation and deception.

Alan marries Gladys, a blonde, hoping she will stand in for Evelyn. Gladys senses the strange happenings in the house and grows uneasy. The marriage ties Alan to a new, fragile partner in the plan.

Gladys experiences haunting phenomena and is ostracized by Evelyn's brother and Alan's invalid aunt. The chilly reception and supernatural hints widen the sense of danger in the mansion. The house becomes a pressure cooker for paranoia.

Gladys suspects Evelyn faked her death to escape Alan and run away with her lover. Around this time, Evelyn's brother and Alan's aunt are killed by a mysterious killer. The killings escalate the mystery surrounding the estate.

Alan glimpses a zombified Evelyn beckoning from her tomb, marking a breakdown. He realizes the figure still controls his fate and his mind unravels. This vision solidifies his plan for a drastic action.

Overwhelmed by the events, Alan is taken away for permanent institutionalization. Gladys and George believe they have cemented their control or victory over him. The showdown seems resolved, though the conspiracy lingers.

George has been impersonating Evelyn with Susan, planning to gain control of the fortune. The plan seems to succeed until Susan appears and is revealed as the imposter. Gladys drinks champagne that has been poisoned, triggering the next, deadly confrontation.

After the reveal, Gladys attacks Susan, killing her as George watches. George then succumbs to the poison he planned for others. The moment twists the power dynamics in the mansion.

Alan returns with Dr. Richard Timberlane, the physician who treated him previously, and reveals he suspected manipulation all along. He admits he faked the breakdown to draw out the conspirators. The confrontation climaxes in a chaotic chase by the pool.

A bag of sulfur-based fertilizer spills into the pool, turning the water acidic and burning George as he tries to escape. He is arrested, while Alan slips away with his crimes having survived the ordeal. The film ends with a grim sense of justice and ongoing freedom for Alan.