Taxi driver Oh-Taek is experiencing a run of good luck, when charming stranger Geum Hyeok-soo flags down his taxi with a lucrative offer; Hyeok-soo's true nature is revealed; grieving mother Hwang Soon-Kyu searches for her son's killer.

The journey to Mukpo continues; Geum Hyeok-soo's shocking confession terrifies Oh-Taek; Hwang Soon-Kyu presents a key piece of evidence to police, but it's dismissed; taking matters into her own hands, she decides to go after Hyeok-soo herself.

Hwang Soon-Kyu tracks down Geum Hyeok-soo and Oh-Taek, following their route to Mukpo; Hyeok-soo reveals the lengths he'll go to secure Oh-Taek's cooperation in the journey; Oh-Taek's attempts to signal a highway patrol car end in disaster.

Oh-Taek is forced to act as Geum Hyeok-soo's accomplice in his killing spree; detectives delve deeper into a string of murders; Hwang Soon-Kyu crosses paths with Hyeok-soo and Oh-Taek.

Oh-Taek receives an ominous phone call; determined to get to Mukpo, Geum Hyeok-soo once again forces Oh-Taek to play his deadly game; Oh-Taek and Hwang Soon-Kyu finally join forces.

Hwang Soon-Kyu comes face to face with her son's killer; Geum Hyeok-soo and Oh-Taek finally part ways but not before Hyeok-soo reveals what's inside his suitcase; the deadly cat and mouse game comes to a shocking conclusion.