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.
You can now watch The Killer online on the following streaming providers in the United States.
| Directing | Choi Jae-hoon | Director |
| Writing | Nam Ji-Woong | Writer |
| Camera | Kang Sang-hyup | Key Grip |
| Art | Kang Dong-hun | Production Design |
