Park Dashu (Zheng Junhao), a top law student who graduated from Seoul University, had a peaceful life, a stable relationship with his girlfriend of six years, and a thriving career, but all this changed after sharing a bed with Zhang Zhenqing (Jin Jingen), the leader of the famous gang "three J". It turned out that the Zhang gang felt deeply about their own quality and wanted to attract a highly educated son-in-law for the honor of the family. Pu Dashu unfortunately entered the vision of the three Zhang brothers and was designed to share a bed with Zhenqing. Since then, the three Zhang brothers used the incident in the same bed as an excuse to intimidate and seduce the big book. On the other hand, Father Zhang was also quite fond of this future son-in-law, so Park Dashu had to be ordered to see his future "father-in-law." although Zhen Qing came from a gangster family, he was not violent. Under the attack of the forced calculation of the three brothers and the meek character of Zhenqing, the big book was shaken.