After Lim Leting and Xia Wanxi got divorced, Lim Leting has been living alone with Lim Chuxin, the younger twin. On the other hand, Xia Wanxi brought along the older twin, Xia Qing and got married into a wealthy family.
Years later, both twin meet on one fateful day. Ever since, they constantly exchanged identity and solved problems in each other’s family, work, love and study. As the switch got more and more frequent and the twins lived each other’s lives in substitute, a greater crisis awaits.