The Harmony Resort promises hope for struggling marriages. Run by celebrity power couple Drs. Miles and Grace Markell, the "last resort" offers a chance for partners to repair their relationships in a luxurious setting on the gorgeous Mayan Riviera. As a deadly tropical storm descends on the coast, trapping the hosts and the guests on the resort, secrets are revealed, loyalties are tested and not one single person--or their marriage--will remain unchanged by what follows.