When retired hitman’s wife goes on vacation with her friend, she asks him to look after the friend's teenage daughter. Things go awry when he is forced to use a little violence to protect the girl from juvenile delinquents, but then they are found dead and the girl is kidnapped.
Unfortunately the movie The Killer is not yet available on HBO Max.
| Writing | Nam Ji-Woong | Writer |
| Directing | Choi Jae-hoon | Director |
| Art | Kang Dong-hun | Production Design |
| Camera | Kang Sang-hyup | Key Grip |
| Costume & Make-Up | Choi Min-seon | Makeup & Hair |
