Geum Byeol and Eun Byeol are twin sisters and have had a bad sibling relationship since they were little girls. Geum Byeol was treated like a princess by their mother while Eun Byeol was neglected and forced to give in to her sister all the time. The sisters had a long, tempestuous relationship but this conflict between them should have ended when they got married. Instead, their marriages took their sibling rivalry to new heights. They later found out that their husbands were sworn enemies. This TV show revolves around unequal childhoods and how two siblings find themselves the daughters-in-law in two feuding families which they try to mediate. These multiple strained relationships between people are portrayed in a lighthearted way as the related parties eventually resolve their issues through forgiveness and love.