Shen Qingshuang, the last descendant of Bajiquan, was forced to marry Gu Jinxiao, a businessman in order to keep the century-old martial arts school. She thought this was just a cold transaction of power and money, but she didn't know that she had already become that man's obsession that spanned two lives and had to be locked up in his heart despite all his intentions. On their wedding night, he broke her pride: "Your body and your fists are mine." She resisted with force and shattered the shackles of the golden cage with one punch. When the dusty grievances and bloody business wars of the Republic of China hit one after another, she discovered that she was never the only one trapped in this situation of robbery. Until he knelt in front of the martial arts gym with scars all over his body, offering all his wealth and sincerity: "Qingshuang, my life will be guarded by your fists from now on."