Jang Tae-san is a third-rate gangster managing a pawnshop. He is shocked when Seo In-hye, an old flame, reappears in his life after 8 years and wants him to get a blood test. Her daughter, Seo Soo-jin, has leukemia. After receiving news that he is a suitable bone marrow donor, a two-week preparatory window is established for the surgery. Tae-san must remain healthy and virus free or Soo-jin will die.

Im Seung-woo, In-hye, and Soo-jin are delighted by the news of the surgery and don't know what to do. Seung-woo, who holds Soo-jin in his arms and likes her, receives a call informing him of a murder case. Tae-san is taken away by the police as a suspect in the murder of Oh Mi-sook. Tae-san, who is falsely accused, finds this situation frustrating. The vehicle transporting Tae-san collides with an oncoming dump truck, causing an accident.

Tae-san takes advantage of a traffic accident involving the escort vehicle to escape. Upon learning that Tae-san is the culprit who murdered Mi-sook, Park Jae-kyung is shocked to the core, while Seung-woo, who hears about Tae-san's escape, is furious. Meanwhile, while sorting through Mi-sook's belongings, Jae-kyung discovers a clue in Mi-sook's underwear that reveals the whereabouts of a digital camera.

Tae-san jumps down from the mountain like crazy to avoid being caught, but someone catches him. Tae-san disappears in front of their eyes, and Jae-kyung and Seung-woo suspect that someone is behind Tae-san. In-hye hears the news of Tae-san's escape on the news and is taken aback. Meanwhile, Jae-kyung and Seung-woo, who missed Tae-san, start the investigation from the beginning. Seung-woo discovers In-hye's phone number in Tae-san's call history list and is taken aback.

Tae-san runs away after killing Go Man-seok, with Seung-woo chasing after him. Tae-san manages to shake off Seung-woo, only to be met by Kim Seon-saeng (Teacher Kim) waiting for him. Jae-kyung rushes to Tae-san's house upon hearing the news that Tae-san killed Man-seok. As Tae-san enters a village, he hears the sound of a mysterious woman crying there.