Han Seung-un

Joon-seok is sent to prison for his involvement in Dong-soo's death. He meets Dong-soo's son in prison, keeps his identity a secret, and agrees to join forces when he is released. All of their plans fall apart when Sung-hoon finds out the truth.

In-ho is willing to do anything to protect his first love, Mi-ju, including murder. They cannot forget each other while In-ho is in prison, but their love does not go smoothly.