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. Soon Hyeok-soo's true nature is revealed. Grieving mother Hwang Soon-Kyu searches for her son's killer.

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.