Kang In-Kyu’s father was brutally murdered 13 years ago. To take revenge on those who are responsible for his father’s death, he becomes a doctor. Kang In-Kyu volunteers at a prison medical office where the murderer is imprisoned.

• Go Kyung-pyo
• Cho Jae-hyun
• Jeon So-min
• Jin Yi-han
• Yang Jin-sung
• Jang Gwang
• Kim Jong-goo
• Heo Sung-tae