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 | Philip Kwok | Writer |
| Production | Lee Kin-Hing | Producer |
| Production | Andrew Kam | Producer |
| Writing | Andrew Kam | Writer |
| Writing | Chow Jan-Wing | Writer |
| Editing | Chan Gan-Shing | Editor |
| Sound | Barry Cheung Foo-Ling | Original Music Composer |
| Camera | Patrick Jim | Director of Photography |
| Editing | Gwok Wai-Kuen | Editor |
| Art | Lam Chun-Fai | Art Direction |
| Costume & Make-Up | Law Ging-Fai | Costume Design |
| Editing | Andrew Kam | Editor |
| Sound | Sam Leung Yiu-San | Original Music Composer |
| Sound | Mui Siu-Kei | Original Music Composer |
| Art | Law Ging-Fai | Art Direction |
| Costume & Make-Up | Ha Ching | Costume Design |
