Young married couple Yoon-hee and Jung-hyun go on a road trip, and along the way they pick up a lone drifter, M. M turns out to be a violent and sadistic psychopath who terrorises the couple at every turn. After capturing Jung-hyun, Em gives him a choice: submit to torture or allow Em to kill Yoon-hee.
Em / M
Yun-hie
Jeong-hyun
Manager
Detective Ma
Detective Kim
Detective Han
Cop
Young cop
Old man
Mechanic
Trucker
Veterinarian
