万圣节前一天，五名狂欢节员工被绑架挟持到一个称为“肃杀世界”的孤立院子。在万圣节时，他们会被扔进一个名叫“31”的优待狂的游戏中，他们将面对一群穿得像小丑一样的疯子。但是，小丑并不是独一需求担忧的，一个更庞大的邪教仪式和更严酷的阴谋将被唤醒...... A day before Halloween Carnival, five employees were kidnapped hostage to a called "isolated yard desolate world". On Halloween, they will be thrown into a sadist named "31" in the game, they will face a group dressed like a clown. However, the clown is not the only need to worry, a more ambitious cult and a more brutal plot will be awakened......