Dave and Ronnie, Jason and Cynthia, and Joey and Lucy are close. The group used to include Shane and Jennifer, but they divorced and she s gone. Jason and Cynthia announce that their marriage is in trouble, and they beg their friends (and Shane s young girlfriend) to join them on a couples retreat, at the package rate, on a tropical island. The others reluctantly agree, planning to play while Jason and Cynthia work on their marriage with an island psychologist. To everyone s surprise, the package is inflexible: each couple must participate in the couples exercises. Soon fault lines appear in all four relationships. What s in store for each couple?