Season 1

Oh Taek's last customer Geum Hyuk-soo asks if Taek could drive him to Mukpo and he accepts the offer. When Hyuk-soo says he killed a man before, Oh Taek senses something is wrong.

Oh Taek hits the road again without realizing Geum Hyuk-soo's murder at the rest stop. Hwang Soong-yu suspects that Geum Hyuk-soo is behind her son's suicide. She decides to chase Geum Hyuk-soo herself.

While Oh Taek continues to listen to Geum Hyuk-soo's confession of his murders, he runs into a highway patrol. However, due to the fear of Geum Hyuk-soo's threat, Oh Taek blows up his chance.

Kim Joong-min finds Geum Hyuk-soo's fingerprints in the camper van. Hwang Soong-yu finds the taxi, but Hyuk-soo and Taek are already gone. Oh Taek barely escapes from Hyuk-soo and calls the police.

Taek contemplates after Hyuk-soo's call that if he does not return to the remote house, Seung-mi will be killed. Hyuk-soo tells Taek that Seung-mi will only be spared if he manages to smuggle out.

Taek calls Kim Joong-min in secret and informs where Hyuk-soo is going. However, Hyuk-soo soon finds out, and Seung-mi is in danger.