Rose and Sammy enjoy an idyllic life with love, a Hollywood Hills home, and a curious son. During a party, Sammy assigns unusual significance to it, while Rose juggles preparations amid distractions. The unexpected arrival of Helen, who claims residence t 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。 
