In a southern town during the Republic era, bandits ambush foreman Dai Wencai, killing his attendant despite taking his money. When Dai mentions his master Liu Songyun, the bandits hatch a plan to seize the Liu family’s fortune.

Bao Yong, a former boxing champion, is now an unconventional high school homeroom teacher. To raise money for a student in need, he returns to the ring, partnering with Gao Hongde, who is running his boxing gym at a loss, to prepare for a prize competition. Meanwhile, the rebellious teenager Yang Fan accidentally discovers Bao Yong's secret. This battle of passion, responsibility, and growth in the ring has just begun...