Jang Taeho, a finance genius, fails in a financial scheme, leaving him with nothing. Pursued by those who lost millions in the failed scheme, Taeho is forced to hide in the underworld. At the bottom of life's pyramid, he will learn about the beggars' mafia-like world and their hierarchy, which Taeho decides to climb to take back his life.
Cast:Yoon Kyesang , Beom-su Lee , Seo Ye-Ji , Park Yejin , Ha Dong , Park Won-sang , Hyeong-jin Kong , Jong-jun Jeong , Won-yeong Jang , Yong Woo Lee , Se-ha Ahn , Jae-yee Goo , Cheol-min Lee , Ji-Hoon Kim , Hyo-jeong Ban , Lee Do-kyung , Ki-Cheon Kim , Kim Jong-goo
In order to move his way up to the top of the Seoul Underground Seven, Tae Ho must start with Number Six.
Kwak Heung Sam offers Tae Ho a way out of his predicament with President Jung, but at a heavy cost.
When Tae Ho fails to deliver on his promise to Heung Sam, a new scheme is devised.
Tae Ho sets up a trap for President Jung, but one of Tae Ho's allies is in grave danger.
When Tae Ho springs his trap on President Jung, he finds out that it bites both ways.
Ryu Jong Goo is forced to revisit his past when the woman he loves gives up on him.
When Number Three returns from jail, he is perturbed to find Sergeant Bae is missing.
Straw Cutter is set on finding retribution from Tae Ho for his rumored elimination of Sergeant Bae.
Tae Ho delves into the mystery behind Kwak Heung Sam's younger brother.
Poison Snake and Crocodile are intent on reestablishing their power in the Seoul Underground hierarchy.
Tae Ho must square off against Jong Goo to prevent him from making the ultimate mistake.
After humbling himself, Jong Goo is allowed the chance to walk away.
Tae Ho sets up his final trap to get revenge on Chairman Kwak.
Two men square off, both seeking revenge. Only one can be the LAST man standing.