Twelve pairs of identical twins battle in this reality show. Each week the twins must work with their sibling to win challenges that provide immunity from being voted off by the other competitors. The whole time the contestants live together in two separate but identical "houses" (with each twin being separated), unless they win a challenge which entitles them to move freely between the two houses for a day. At the end of each episode, the two sets of twins with the most votes face off against each other answering questions testing how well they know their sibling, and the losing team goes home. At the end of the season the last remaining team wins $222,222.22 in cash.