RUBY

In 1935 Florida, lowlife mobster Nicky Rocco is betrayed and executed in the swampy backwoods as his pregnant gun moll Ruby Claire watches. He swears vengeance with his dying breath, and then she suddenly goes into labor. Sixteen years later in 1951, Ruby is now running a drive-in theater in the backwoods near her home and employs ex-mobsters to run the theater. Her 16-year-old daughter, Leslie Claire, is mute and has been since birth, and she resides in the home with Ruby, her lover and henchman Vince, and Jake Miller, a blind, wheelchair-using former mobster who had his eyes cut out. Ruby spends her days overseeing the theater's operations and lamenting her short-lived career as a lounge singer.

One evening during a drive-in showing, the projectionist Jess Littinger experiences poltergeist activity in the projection booth, and he then is found hanged. Ruby dismisses his death as a suicide and instructs Vince to get rid of his body. Meanwhile, Lila June, a patron at the theater, is given a necklace from Louie, a clerk at the concession stand, that he stole from Ruby. He attempts to rape Lila, but she flees. Louie is accosted by an invisible force in the woods that kills him. The following morning, Leslie and Vince find Louie's bloodied corpse hanging from a tree. Ruby fears that Nicky's spirit has returned to torment her, fearing he believes she lured him to his death.

At nightfall, Vince and Ruby take Louie's corpse to the swamp to dispose of it. Later, Vince is visited by Dr. Keller, a prison psychologist who helped Vince receive an early parole. Dr. Keller, who claims to be clairvoyant, investigates the property, and tells Vince that he senses the drive-in is being stalked by a supernatural presence. Vince and Dr. Keller arrive at the house to speak to Ruby about Dr. Keller's findings. Later, a drunken Ruby goes to the drive-in grounds to speak to Nicky, and she is confronted by the sound of his voice calling her name over the theater's sound system, followed by a series of violent apparitions.

In the middle of the night, Ruby is confronted by Leslie in the attic, who begins speaking in Nicky's voice. A violent struggle ensues, and Ruby knocks Leslie unconscious. Dr. Keller attempts to hypnotize Leslie after the incident. During the attempt, Ruby watches in horror as bullet holes appear in Leslie's head, the same as those that inflicted Nicky. Later, Dr. Keller and Ruby discuss Nicky's death, and while Ruby admits to having set up other mobsters, she was not responsible for Nicky's death. Suddenly, Jake appears in his wheelchair, stabbed to death. Ruby and Dr. Keller rush upstairs to Leslie's room and find her body contorted and her speaking in Nicky's voice.

Ruby goes downstairs while Dr. Keller attempts to calm Leslie and attempts to speak with Nicky. She unveils a jar containing Jake's preserved eyeballs, which she cut out herself, as proof of her dedication to Nicky. Dr. Keller phones Vince at the drive-in, urging him to leave as soon as possible. Moments later, Vince is confronted by Nicky's apparition, and a sudden burst of wind overtakes the drive-in. Meanwhile, Leslie, possessed by Nicky, attacks Dr. Keller. Vince manages to rush back to the house, but finds that Ruby has disappeared. Vince and Dr. Keller flee into the swamp, where they witness Ruby walking toward the water hand-in-hand with Nicky. Suddenly, Ruby screams as she is dragged underwater to her death by Nicky's skeleton.

In the climax, Ruby and Dr. Keller confront Leslie, who is possessed by Nicky's spirit, leading to violent supernatural events and the revelation of Ruby's dark secrets.

The ending ties the film’s supernatural threat to unresolved guilt and betrayal, as Ruby’s past actions come full circle through her daughter’s possession. The drive-in becomes both a literal and metaphorical haunted house, with the sins of the past refusing to stay buried. The conclusion delivers both a final confrontation with the vengeful spirit and a reckoning for the surviving characters.