Gao Renjie (played by Zhao Qing), Mei Xiaoyang (played by Lin Jidong), and Li Shimin (played by Fang Zuming) are colleagues at the same pet hospital and are very close friends. The clever single man Li Shimin often comes up with various ideas for the other two married men. The three of them meet Donghua (played by Xing Shan) through work, and with Li Shimin's careful organization, they get to know Donghua's best friends — Baibai (played by Shen Taoran) and Yawen (played by Zhang Nala). Li Shimin falls in love with Baibai, while Gao Renjie and Yawen fall into a passionate romance, and Donghua spends a night together with Mei Xiaoyang. After one night, the three men each have their own concerns. Gao Renjie enjoys the benefits of both his wife Jiji (played by Shi Lin) and mistress Yawen, Li Shimin is in a passionate romance with Baibai, while Mei Xiaoyang is in a cold war with Donghua due to neglect. However, no matter how meticulously extramarital affairs are concealed, they will eventually be exposed. The three unfaithful men must face various consequences and make painful choices between family, love, and relationships.