Bai Na (Zhang Ruonan), a female swindler, and Fang Yaodong (Wu Yuhan), a small town naive man, met on a boat. Unexpectedly, Bai Na was mistaken for Fang Yaodong's wife and was warmly received by Fang's family. In order to expose Bai Na's lies and win back his family's trust, Fang Yaodong fought with Bai Na in a battle of wits and courage, which caused constant laughter. The battle to defend the family was about to start. How would the "female swindler" and the "naive man" fight against each other?