Set in early 20th-century Hong Kong, the story follows Dragon Ma, a loyal and fearless police officer known for his fierce adherence to justice. After his triumphant battle against pirates, Dragon Ma finds himself reassigned to a turbulent district in Hong Kong. This area is plagued by corruption, and the local police force is suffused with bribery and deceit. Dragon Ma’s mission is complicated by his personal vendettas and the challenge of facing higher-ranking officials entangled in illicit activities. Despite these obstacles, he is determined to clean up the city and restore order. His unyielding nature creates friction with corrupt officials while also drawing admiration from law-abiding citizens and fellow officers.

As Dragon Ma navigates treacherous political waters, he becomes entangled with a group of revolutionaries fighting against oppression and colonial rule. Here, he meets two women who are integral to the revolutionary movement, shifting his allegiances and loyalties. As tensions rise, Ma uses his martial arts prowess and clever tactics to deceive and defeat enemies on multiple fronts. Meanwhile, an underground alliance of traitorous government officials conspires against him, testing both his resolve and resourcefulness. With both the revolutionaries and his career hanging in the balance, Dragon Ma must choose between strict legal duty and moral righteousness in a climactic battle that could redefine the future of the contested district.