Ultra serious Ko Lap and carefree Kung Kwan are expert assassins.It's love at first sight for Kwan when he runs into the lovely Bin Yee. And Ko Lap continues to hide his love for Sau Yu, agent for him and Kwan. Unkowingly, Ko Lap executes a contract on Yee's father.
Unfortunately the movie Heart of Killer is not yet available on HBO Max.
| Directing | Andrew Kam | Director |
| Writing | Andrew Kam | Writer |
| Production | Andrew Kam | Producer |
| Writing | Philip Kwok | Writer |
| Writing | Chow Jan-Wing | Writer |
| Production | Lee Kin-Hing | Producer |
| Art | Law Ging-Fai | Art Direction |
| Art | Lam Chun-Fai | Art Direction |
| Camera | Patrick Jim | Director of Photography |
| Editing | Gwok Wai-Kuen | Editor |
| Editing | Chan Gan-Shing | Editor |
| Editing | Andrew Kam | Editor |
| Costume & Make-Up | Law Ging-Fai | Costume Design |
| Costume & Make-Up | Ha Ching | Costume Design |
| Sound | Sam Leung Yiu-San | Original Music Composer |
| Sound | Mui Siu-Kei | Original Music Composer |
| Sound | Barry Cheung Foo-Ling | Original Music Composer |
