一班自命不凡、高人一等的狐朋狗友，相约星期三晚举行“白痴晚宴”。规则非常简单，即是各人只须携一名“白痴之最”共赴晚餐，便能获得丰富奖品。参与者之一皮埃尔（蒂埃里·莱尔米特 Thierry Lhermitte饰）打算带着新认识的皮侬（雅克·维列雷 Jacques Villeret饰）赴宴。皮埃尔本以为

A banker with a talent for memorizing numbers is recruited by a mobster looking to get ahead.

A possessed young girl from an atheist family refuses to let her new powers go and becomes more than a threat to everyone besides her.