距第一部美国派已有10年，三个没救的新处发现了藏在高中图书馆的“索爱天书”。不过不幸的是，书已经残缺不全了。靠着书中不完整的建议，三人踏上了滑稽的破处之旅。

　　The film takes place in Toulouse and tells the story of Jean, a 55 year-old policeman who discovers his son, Maxime, and his son's boyfriend hanged in a hotel roo…