Winchester (2018)

Sarah Winchester is the widow of famed gun manufacturer William Wirt Winchester. Her husband's sudden death and the previous death of their child Annie have left her in grief and convinced she is cursed by the ghosts of those who died at the hands of Winchester firearms.

After seeking advice from a medium, she spent her twenty million dollars inheritance to build an enormous, seemingly never-ending mansion in San Jose, California that would eventually be named the Winchester Mystery House. The house is under constant construction and Sarah's niece Marion Marriott lives in the house with her son Henry. At night, Henry is possessed by a mysterious entity.

In 1906, the Winchester company hires Doctor Eric Price to stay at the house and assess Sarah, believing she is mentally unfit to remain in charge of the company. Still grieving the death of his wife Ruby, Eric is reliant on drugs. He arrives at the house and has a ghostly vision that he believes is the drugs' side-effect. Later, he spots a ghost in the basement. Witnessing a possessed Henry jump off the roof, Eric saves him.

The next day, Eric begins to conduct his assessment of Sarah's mental well-being. Sarah admits her fear of ghosts and believes she can help them move on. She reveals that she knows about Eric's drug problem and confiscates his supply of laudanum. That night, Eric witnesses a seemingly possessed Sarah draw a plan for a new room. He is startled by an entity and flees back to his room. The next day, Sarah shows Eric that she keeps records of people killed by Winchester rifles. It is revealed that Eric had actually been shot and killed by a Winchester rifle before being revived, and he keeps the refurbished bullet with him. Sarah explains how thirteen nails keep spirits sealed in rooms.

A possessed Henry attempts to kill Sarah with a rifle, but is stopped by Eric and Marion. Realizing how violent this spirit is, Sarah sends her staff away and decides to personally remove the ghost from her home. Eric encounters a butler who reveals himself to be a ghost. He and Sarah identify the ghost as Benjamin Block, a Confederate States Army soldier who lost his two brothers in the American Civil War to Winchester rifles. A devastated Ben proceeded to shoot up a Winchester office, massacring the workers before being shot dead by police. Ben has been the one possessing Henry; the constructed room with the Winchester guns is the room where he was shot dead.

A violent earthquake takes place, devastating the house and separating Eric and Sarah. In the chaos, a possessed Henry escapes, pursued by Marion. Eric encounters several ghosts before seeing the ghost of Ruby. It is revealed that Ruby could see and hear ghosts but was misdiagnosed as "delusional" by Eric. Eventually, the unstable Ruby shot Eric before killing herself with a Winchester rifle. Ruby's ghost comforts Eric, inspiring him to help Sarah.

Eric reunites with Sarah and they manage to trap Ben in the room. Marion and Henry are cornered by Ben's brothers. Ben attempts to kill Sarah, but the pair realizes that Ben is scared of the bullet Eric kept. Eric has been able to see the ghosts in the house due to his dying from that bullet beforehand. Eric uses the bullet in the rifle that Ben used in the shooting and banishes him. Henry and Marion are saved and the other spirits return to their rooms.

Eric pronounces Sarah sane, allowing her to remain in control of the company. Sarah announces her intent to build more rooms to help more spirits. As the house is being repaired, the camera returns to view the hall of boarded up rooms and catches a nail falling out of one of the boards that is sealing a spirit in a room.