(Kim Sang-ho): A senior prosecutor who initially sends Yo-han undercover but whose motives become murky. Series Information
: He discovers that the prison is actually an extensive underground gambling den. To survive and seek revenge for his grandmother's death, Yo-han must use his "poker face" and intellect to rise through the ranks of the prison's gambling world.
The series revolves around , a meticulous judicial trainee who lives with his grandmother.
(Kim Sang-ho): A senior prosecutor who initially sends Yo-han undercover but whose motives become murky. Series Information
: He discovers that the prison is actually an extensive underground gambling den. To survive and seek revenge for his grandmother's death, Yo-han must use his "poker face" and intellect to rise through the ranks of the prison's gambling world. (Kim Sang-ho): A senior prosecutor who initially sends
The series revolves around , a meticulous judicial trainee who lives with his grandmother. (Kim Sang-ho): A senior prosecutor who initially sends