"Couples Retreat" follows four Midwestern couples who embark on a journey to a tropical island resort. While one of the couples is there to work on their marriage, the other three set out to jet ski, spa and enjoy some fun in the sun. They soon discover that participation in the resort's couple's therapy is not optional. Suddenly, their group-rate vacation comes at a price. What follows is a hilarious look at real world problems faced by all couples. Critics Consensus: Despite a talented cast and some reliably pleasant interplay between Jon Favreau and Vince Vaughn, Couples Retreat leaves viewers stranded in an arid, mirthless comedy.