In Hong Kong at the end of the Qing Dynasty, a deputy officer known as the "Three Rings of Zhenzhen" in the Upper, Central and Western Regions secretly colluded with Gou Xinhu, a bully in the Western Region, and public security in the Western Region was a mess for a while. After police officer Ma Rulong (Jackie Chan) was ordered to take over West Ring, he quickly arrested Gou Xinhu and imprisoned him, drawing resentment from the "Zhensanhuan ring". At that time, the revolutionary situation in the mainland was in full swing, and revolutionaries came to Hong Kong to publicize and plan to rescue the arrested comrades. In order to capture the revolutionaries in one fell swoop, the Qing court sent secret envoys to contact Zhensanhuan Road, and Ma Rulong met Bai Yinghong, Yingying, Shanshan and other revolutionaries (Zhang Manyu, Guan Zhilin...