"Endless Night" (1972) Hayley Mills

Michael Rogers is a wistful and aimless young aspiring photographer working as a chauffeur and living with his mother in London. From a working class background, Michael aspires to a life of luxury and is obsessed with the fine arts. Through his travels as a chauffeur, he discovers a spot along the Devon coast known as Gypsy's Acre, where a dilapidated Victorian mansion sits. Michael fantasizes about one day building a new home on the plot of land and aims to one day have Santonix, a famed Italian architect whom he met through a client, design the home.

While photographing Gypsy's Acre, Michael meets Ellie Thomsen, a young American visiting England, who is quickly taken by Michael's fantastical nature. While exploring the property, the two encounter Miss Townsend, a mysterious old woman who tells Michael that Gypsy's Acre is for sale, but that it is a cursed land. Ellie leaves England and embarks on the remainder of her trip through Switzerland and Italy with Greta, her German language tutor who has taken on the role of a personal assistant. In Ellie's absence, Michael learns that she is in fact one of the richest young women in the world. He confronts her about this when she returns to England, but she explains she did not want to tell him as she thought it would dissuade him from pursuing her. She also reveals that, while visiting Italy, she was able to arrange a meeting with Santonix about building Michael's dream home. Furthermore, she reveals she has purchased Gypsy's Acre.

Though initially angered by her deceit, Michael eventually relents, and he and Ellie marry in Wales. Ellie attempts to keep the marriage secret, as she fears her stepmother, Cora, and other family members may attempt to bribe Michael to divorce her based on his lower social class, but the union quickly makes international headlines. The family's attorney, whom Ellie lovingly refers to as "Uncle" Andrew swiftly attempts to buy Michael off, but he declines, insisting he and Ellie are in love. The couple subsequently purchases a local antique shop to operate.

As construction of the home begins, Greta arrives, announcing she has taken a secretarial job in London and begins to slowly infiltrate the couple's new life together. Ellie welcomes of her presence, but Michael dislikes her. Frank and the other family members approach Greta with similar scepticism, and wish to distance her from Ellie. At the house, Ellie becomes unnerved when she notices Miss Townsend staring at the home from the fields below for hours at a time. While Michael attends an auction in the city, Ellie goes missing while out riding her horse. Her body is subsequently found in the woods on Gypsy's Acre. An autopsy suggests she died of unexpected cardiac arrest, but Michael contests this during the inquest, believing there may have been foul play. The police attempt to trace Miss Townsend but are unable to locate her. After the inquest, Andrew notifies Michael that Ellie made him the sole beneficiary of her estate, and urges Michael to travel to the United States to tend to Ellie's business dealings there. Santonix, meanwhile, dies after a protracted battle with cancer.

Upon returning to Gypsy's Acre from the United States, Michael witnesses an apparition of Ellie as he approaches the house. Upon entering, he and Greta embrace romantically, and begin to have sex—it is revealed the two lovers had conspired all along, preying on Ellie to take her estate: Greta killed her by lacing her allergy medicine with cyanide and bee venom, which stopped her heart. Michael and Greta's plans of a lavish life together are swiftly interrupted, however, when they receive an envelope postmarked from New York City—sent by Andrew—containing date-stamped photographs of them together long before Michael had met Ellie, serving as evidence of their conspiracy. Michael violently lashes out against Greta, blaming her for their predicament, and murders her in the swimming pool. This triggers a memory from Michael's childhood, in which he killed his schoolmate by pushing him into a frozen pond and stealing his watch as a memento.

Michael is interviewed by police and Dr. Philpott, a local psychologist, and admits to helping murder Ellie. Philpott questions him about Miss Townsend, whom he presumes was paid to frighten Ellie, and then killed by Michael afterwards to prevent her from exposing the plot; Michael, however, insists Miss Townsend never existed. As they question him further, Michael suffers a nervous breakdown, haunted by images related to those he has killed.