Jang Tae-san is a small-time gangster who has learned to survive with his fist and wits. He meets and falls in love with a college student, Seo In-hye, who sees a good heart and wounded soul underneath his tough exterior.[4] When In-hye gets pregnant, Tae-san prepares to leave the gangster organization to start a life with her. But he is blackmailed by the gang boss, Moon Il-seok, who wants Tae-san to be his fall guy for an assault charge and go to prison in his place; Il-seok threatens to kill In-hye if Tae-san refuses. So Tae-san tells In-hye to get an abortion and cruelly breaks up with her, then goes off to prison for several years.
Eight years later, Tae-san is running a small pawnshop. One day, In-hye unexpectedly pays him a visit and tells him that she cut ties with her disapproving family and had the baby after all. But her daughter Soo-jin has been diagnosed with leukemia and needs a bone marrow transplant. Since she isn't a match, that leaves Tae-san. Reeling from the discovery that he's a father and wanting to do something good for once in his meaningless life, Tae-san agrees to the undergo the surgery, which is scheduled to take place in two weeks. But he becomes embroiled in political intrigue when Il-seok conspires with a corrupt politician Jo Seo-hee to frame Tae-san for the murder of an undercover agent, who had infiltrated the gang under the orders of prosecutor Park Jae-kyung. Tae-san is arrested by detective Im Seung-woo, who happens to be In-hye's current fiancé. While being transported, the police car he's in gets into an accident and Tae-san escapes. Now a fugitive, he is hunted by both the police and an assassin, and what ensues is two weeks of his desperate struggle to save his life and his daughter's.
Orphaned at a young age when his father left and his mother committed suicide, Tae-san became a small-time gangster. After getting falsely accused of murder and learning that he has a daughter with leukemia, Tae-san spends the next two weeks in a life-or-death struggle to save himself and the girl.
A smart and warmhearted prosecutor who is determined to find out the truth about Jang Tae-san's murder case. She soon becomes convinced of his innocence and tries to help him.
A talented detective who comes from a long line of police officers in his family. He's leading the police manhunt for the fugitive Jang Tae-san, and is In-hye's current boyfriend.
She is the first love Tae-san can't forget, and unbeknownst to him, In-hye raised their daughter Soo-jin as a single mother for eight years. After Soo-jin's leukemia diagnosis, In-hye and Tae-san embark on a race against the clock to save their daughter's life.
A businessman with seemingly legit business interests, but is deep down a cruel and heartless man who will do everything to silence Jang Tae-san, who knows his secret.
A professional assassin who has served in the French Foreign Legion, who is hired by his father Il-seok to kill Tae-san before he's captured by the authorities.
in 2019, Horipro and Kansai TV made Japanese adaptation of series which Haruma Miura and Kyoko Yoshine in leading roles, it was last works of Miura before his death in 2020[17][18]