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