- Sung-Hoon (Kim Woo-Bin) was raised by his mother and doesn't have any memories of his real father. His childhood was miserable, surrounded by his mother's gangster friends. He eventually became a gang member himself. He is now imprisoned for fighting against other gang members in a Buddhist temple.
Meanwhile, Joon-Seok (Yu Oh-Seong) has been in prison for almost 17 years and is set for release in the near future. A woman comes to the prison and requests to talk with Joon-Seok. The woman was in his circle of friends during his high school days. She informs Joon-Seok that her son Sung-Hoon is an inmate in the same prison. She asks Joon-Seok to protect her son from other gang members. Joon-Seok soon takes Sung-Hoon under his wings in prison.
When Joon-Seok is released from prison he learns that Eun-Ki (Jung Ho-Bin) has gotten rid of his men and now dominates the gang which Joon-Seok's father (Joo Jin-Mo) started. Joon-Seok plots to take back control of his gang.
Meanwhile, Sung-Hoon is released from prison and works for Joon-Seok in his power struggle against Eun-Ki. Joon-Seok and Sung-Hoon are both unaware that Joon-Seok once ordered the murder of Sung-Hoon's father (Jang Dong-Gun) many years ago.
Kwak Kyung Taek
Yu Oh Seong
Kim Woo Bin
Joo Jin Mo
Jung Ho Bin
Lee Cheol Min