Cheng Xuan successfully defeats the previous boxing champion Lin Sen to become the first-ever female champion, only to be exposed for using a banned substance on the podium. Scorned by all, she is forced to hide her identity as Chen Xuan and go on the run with her mother. Five years later, Cheng Xuan arrives in Zhongxia City, becoming a cleaner at Hengli Fitness Gym. She marries Rong Yan, who uses the alias Lu Chuan, and they have a child. When Wang Wei, a young master from the Wang Group, fails to woo the gym's boxing coach Song Jiaojiao, he comes to Hengli to cause trouble. With Cheng Xuan's clever maneuvers and hints, Song Jiaojiao successfully fights back. After his setback, Wang Wei hires Jack, a nominal disciple of champion Lin Sen. Song Jiaojiao is no match for him. At the critical moment, Cheng Xuan makes her move...
