One Halloween night. One masked killer. Six potential victims. A group of high school students win a competition in which the prize is spending the night in an amusement park closed to the public. However, a problem quickly arises - they are to be shown around the grounds by a former school friend with whom they have been at odds for a long time. Another, more serious problem follows him - a murderer dressed in a doll costume is roaming the town, who has set himself the goal of murdering everyone gathered. Will the heroes manage to avoid the carousel of death?