In order to support his family, Li Jiangtu (played by Zhou Yuan) gave up his dignity and became a member of the Japanese Imperial Police, helping the tyrants. A series of accidents and the unfortunate encounters of his brother Li Jiangshan (played by Shin Hyun-jun) made Li Jiangtu see the greed and corruption of his colleagues. In pain and anger, he practiced boxing and transformed himself into a mysterious man "Bride Mask" who eliminated harm for the name. By chance, Li Jiangtu met a man named Kimura Shunji (played by Park Ki-woong). The two hit it off and became friends who shared life and death. However, one day, the solid friendship between Li Jiangtu and Kimura Shunji encountered an unprecedented huge crisis. It was a beautiful woman named Mudan (played by Chen Shiyan). Jiangtu and Shunji could not resist the great charm she exuded, and the two became rivals in love. After that, Shunji accidentally discovered the true identity of the "Bride Mask". Between friendship and love, what choice will Shunji make?