Four ex-couples live under one roof for three weeks to find love-new or re-visited. Knowing everyone’s ex is in the house, they must hide who that is by pretending to be strangers. While keeping that a secret, they try to get to know others and build new relationships throughout their stay. Through the EX-REVIEW and EX-CHAT systems, singles have opportunities to learn about their new date partners from the ex of that person. Will new relationships begin? Or do ex-couples rekindle their feelings? (Source: CJ ENM)