Eight couples that are "at a crossroads" travel to a tropical paradise, but they're in for a shock as our host reveals how they're going to test their relationship - by dating each other's partners! Every 48 hours the contestants will swap partners to see if their original relationship can stand the strain. To test their relationship even further, the contestants will have to complete challenges, go through sex therapy sessions and have "behavioral workshops." At the end of the retreat, the couples must make one final decision, once and for all: to stay together, or split up for good.