Mary is a psychological horror film that combines the haunting mystery of the open sea with the slow unraveling of a family’s sanity. The story follows David, a struggling boat captain, who dreams of giving his family a better life. When he finds an old ship named Mary at an auction, he decides to buy it, believing that restoring it and starting a charter business will change their fortunes. His wife, Sarah, is hesitant but supportive, hoping that this project might save their troubled marriage.

As the family sets sail on the refurbished Mary with their two daughters, Lindsey and Mary, and two crew members, strange events begin to occur. At first, it’s small things—unexplained noises, flickering lights, and the youngest daughter’s claims that she hears voices. The tension grows as the ship drifts farther from shore, and what was meant to be a family adventure slowly turns into a nightmare.

The younger daughter, Mary, becomes increasingly withdrawn and starts behaving oddly. She speaks to invisible figures and draws disturbing images that hint at something sinister aboard the ship. Sarah begins to suspect that the vessel has a dark past. Her fears are confirmed when she discovers that the boat once belonged to a family that mysteriously disappeared at sea years earlier. The same evil force that haunted them now seems to have set its sights on her own family.

As days pass, paranoia and fear spread among the crew. David, determined to reach their destination, refuses to turn back despite the terrifying signs. The ocean becomes a symbol of isolation and madness—its vastness mirroring the characters’ growing sense of helplessness. The supernatural presence aboard the ship starts to control their minds, blurring the line between hallucination and reality.

Sarah tries to protect her daughters, but the evil spirit’s grip tightens. The ship’s history reveals that it is cursed, drawing families to their doom by feeding on their emotional weakness. The storm that hits near the film’s climax becomes both literal and psychological, tearing apart the fragile balance between survival and surrender.

In the end, the story is told through flashbacks as Sarah recounts the tragedy to the police. She is the only survivor, traumatized and unsure of what was real. Mary leaves viewers with a chilling question: was the evil truly supernatural, or was it the darkness within the human mind? Through its eerie setting and emotional tension, the film explores fear, guilt, and the destructive power of obsession hidden beneath the surface of family love.