An imprisoned martial arts expert (Donnie Yen) is released to help the police track down a serial killer who is targeting kung-fu masters to prove he is the greatest fighter. Originally in Cantonese/Mandarin; widely available as a Tamil dubbed Where to Watch/Find
: The movie is available on mainstream platforms which often include multiple audio tracks (including Tamil or English dubs). Check Amazon Prime Video Verify the Title kung fu killer isaidub
The story is a classic "hunt for a serial killer" structure but replaced with a specialized martial arts twist: Fung is attempting to become the "number one" by defeating specialists in every major discipline—kicking, grappling, and weapons—mirroring the historical obsession with being the undisputed master. Themes of Obsession and Ruin An imprisoned martial arts expert (Donnie Yen) is