Song Wanxing and her arch-rival Sheng Zelin unexpectedly flash-married, signing an agreement where whoever commits adultery leaves with nothing. To escape the marriage, Song Wanxing goes to great lengths to set traps to catch Sheng Zelin cheating, but fails repeatedly. Sheng Zelin protects her secretly, uses her birthday party to reunite with old friend Lin Yuerou, and exposes the conspiracies of secretary Xu Ying and senior schoolmate Cheng Cheng, such as manipulating photos to spread rumors and using drugs to drive a wedge between them. After misunderstandings are cleared up, Song Wanxing realizes she has long fallen in love, but demands Sheng Zelin pursue her all over again. Sheng Zelin proposes romantically, and finally the two remarry, ushering in a happy ending.