He Zhan is a law-abiding cat in marriage, while Ding Xiu is a restless mouse who takes advantage of the marriage. The two become suspicious of a doll that appears unexpectedly, and start a cat-and-mouse chase. However, Liang Juan breaks into the game, turning the cat into a mouse, and the mouse also has the opportunity to become a cat.
In this shaky marriage game, everyone thinks that they are just a cat trying to get away with it, but they don't know that their identities have already quietly changed.
Concept: a matrimonial game of cat and mouse.