Two sisters in 1987 England find a mysterious music box in their new home's attic that unleashes a supernatural killer. The film will follow the detective assigned to the case of 37 killings over 30 years that seem linked to the music box. As the detective gets closer to the truth, the music box mysteriously appears in her daughter's bedroom, endangering her life. The opening scene shows the sisters finding the box and being stalked in a field by the killer, revealed to have a pumpkin head and scythe, taking the life of at least one sister.