: His mission goes sideways when his superior is murdered and his colleagues disown him, leaving him "trapped" as a real prisoner.
(Lee Yoo-young): An ambitious businesswoman who assists Yo-han for her own vengeance.
: 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. : His mission goes sideways when his superior
: He forms a tense partnership with Oh Soo-yeon , a successful businesswoman with a dark past seeking her own retribution, and Jang Sun-oh , a gambling genius who controls the prison's underground games. Cast & Characters
(Kim Sang-ho): A senior prosecutor who initially sends Yo-han undercover but whose motives become murky. Series Information To survive and seek revenge for his grandmother's
: At the suggestion of senior prosecutors, Yo-han goes undercover into Seongju Prison to gather evidence against a corrupt gambling ring and a high-ranking prosecutor.
The show consists of and was originally broadcast on JTBC in 2022. It is available for streaming on platforms like Viki and Netflix . Watch Insider | Netflix Series Information : At the suggestion of senior
The series revolves around , a meticulous judicial trainee who lives with his grandmother.