The Jack in the Box Rises

A man uncovers a buried box in a field and takes it home, where his wife reacts with annoyance toward the mysterious object. The box sits on their table, radiating an uneasy presence that unsettles her. The discovery sets the film’s dark thread in motion.

The being inside the box emerges and violently kills the husband’s wife before his eyes. The attack is sudden, brutal, and unmistakably supernatural. The husband is left terrified and helpless as his wife dies.

Years after the tragedy, Casey, an American, travels to a British town to rebuild his life after his girlfriend’s death. He starts work at an antiques museum and forms a connection with Lisa, a colleague who shows him the museum’s oddities. The move sets up the central mystery around antiques and haunted objects.

Casey and Lisa explore a restricted room of dubious objects and discover a very old book and the Jack-in-the-box. When Casey touches the box, it activates and reveals a disturbing clown puppet. The eerie setup hints at a dangerous legend surrounding the item.

That evening, two thieves break into the museum during a quiet dinner with Casey and Lisa inside. They insult the clown in the box, and the demon erupts, killing them. The museum becomes a scene of unexpected horror and a chilling warning about the box’s powers.

The next day, an expert in ancient objects visits and confirms the box's extraordinary value. He explains legends that some objects are inhabited by demons, warning Casey that he may be dealing with something beyond ordinary crime. Casey's guilt over his girlfriend’s death adds personal weight to the discoveries.

Casey is haunted by memories of his girlfriend and suffers from insomnia. A customer at the museum disappears after Casey's exhaustion prevents him from noticing, and a missing-person poster appears on the street nearby. The sense of danger becomes increasingly personal for him.

The cleaning lady is brutally attacked by the demon at the museum. A police detective questions Casey about possible supernatural involvement, suggesting the case is more than a simple crime. Frustrated and scared, Casey seeks Maurice, the renowned demonologist, for answers.

Casey contacts Maurice for guidance, but the expert does not answer. The silence ramps up the tension as Casey weighs his next moves and the possibility that his sanity may be eroding. The absence of authoritative help leaves him more exposed to the supernatural threat.

Casey returns to the museum at night and encounters the demon face to face, but the creature spares him for the moment. He then tracks down the box’s original owner, who was once accused of his wife's murder, and learns the true culprit was the demon. The owner’s tale confirms a long history of misjudgments surrounding the box.

Casey is summoned by his boss Rachel and fired for his strange behavior. Lisa defends him, and Casey seeks Maurice again, who outlines a plan to lock the demon away and warns Casey to run if necessary. The tension between workplace authority, friendship, and occult danger peaks here.

Casey returns to the museum to confront the demon and manages to trap it back inside the box, though a claw remains outside. He is unable to save Rachel, who has already fallen to the creature. Police arrive and arrest Casey for murder, while Lisa’s testimony is offered in his defense but is not believed.

The final act shows Lisa attempting to bury the box to seal the demon away. The demon emerges and devours Lisa just as Casey is being questioned, underscoring that the threat is far from over. The scene leaves the mystery unresolved and ominous.