Description：The handsome Li Zheng (played by He Junxiang) works as a "True Love Investigator" in his sister Li Ying's (played by Gao Fei) "True Love Club". He contacts the client's fiancée or girlfriend to diagnose the marriage of these suspicious men. Li Zheng is very good at this job, but he feels exhausted at the same time. Li Ying's club receives a new client, Xiao Feng (played by David Wu), a bachelor. Li Ying is very excited and assigns her brother to seduce Xiao Feng's fiancée Fei Er (played by Ruby Lin) so as to promote her and Xiao Feng. Fei Er, a psychological counselor, is quite opinionated, which makes Li Zheng feel that he has met his match. After several contacts, Li Zheng secretly falls in love with Fei Er. On the other hand, Li Ying intervenes in Xiao Feng's life under the pretext of investigation, but as the four people get to know each other better, the Li siblings find that things are not going well.