Set in 1920s Shanghai, the film introduces Chen Zhen, a martial artist who fakes his death during the war. Returning to the city under a new identity, he is determined to fight corruption and protect the innocent.
Chen Zhen secretly joins resistance groups while infiltrating criminal factions. With his martial arts skills, he becomes a hero to the oppressed, taking down the powerful forces controlling Shanghai.

As the story unfolds, Chen Zhen discovers a dangerous conspiracy involving the Japanese and local warlords. His quest for justice leads him into intense, action-packed confrontations.

Directed by Andrew Lau and starring Donnie Yen, the film combines thrilling fight sequences and an emotional storyline, portraying a tale of vengeance and justice in a turbulent time.