Li Xiaoyang (Qin Hao), Liu Jiayi (He Rundong) and Gao Donghua (Zhou Yiwei) are best friends and roommates in college, and they have a very good relationship with each other. Li Xiaoyang has always been in love with a beautiful school girl named Chen Xin (Zhang Zilin), but Chen Xin only thinks that Li Xiaoyang is a big brother who cares for her. After graduation, Liu Jiayi became a tour guide. He and his girlfriend Yang Fei (Zhang Xinyi) have been dating for many years and decided to join hands in marriage. Who knew that at this juncture, a female tourist named Deng Yuqi (Huang Cancan) walked into Liu Jiayi's life. Over there, Gao Donghua and Tian Xiaoya (Tian Yuan) have been married for seven years. During these seven years, Gao Donghua has cheated a lot, but he thinks he is smart and thinks his wife has been kept in the dark. However, by chance, a secret of Tian Xiaoya overturned Gao Donghua's whole world.