A lovelorn pompous knight lashes out after losing a friendly bout with a rival classmate who's also betrothed to the teacher's daughter. Enraged, the estranged knight threatens his own clan who withholds a closely guarded family secret.
Unfortunately the movie The Mad Killer is not yet available on HBO Max.
| Crew | Yuen Wo-Ping | Martial Arts Choreographer |
| Crew | Yuen Cheung-Yan | Martial Arts Choreographer |
| Production | Wong Toh | Producer |
| Production | Chow Sau Hing | Production Manager |
| Production | Wong Kwong Ming | Production Manager |
| Camera | Hua Shan | Director of Photography |
| Lighting | Ma Koon-Wah | Lighting Technician |
| Sound | Cheung Wah | Sound Recordist |
| Directing | Chan Wa | Assistant Director |
| Editing | Kwok Ting-Hung | Editor |
| Sound | Liang Chou | Original Music Composer |
| Writing | Gwok Ga | Screenplay |
| Directing | Lo Chen | Director |
