Curse, murder and revenge lie hidden within the air conditioning vent. Based on a chilling true story that rocked and rattled Thailand. A band of teenage musicians are drawn to an unmentionable fate inside a cursed motel. Within Room #409, hanging down from the air conditioning vent, a mysterious strip of white cloth lures each of the band members to investigate. After having visions of a woman with long hair and demonic eyes they visit a Buddhist monk who reveals what horrors awaited them, as they must all face the curse of a beheaded prostitute.