Insider - Season 1

At a high-end gambling house, Kim Yo-han raises the stakes beyond what he can afford. Mok Jin-hyeong asks him to stick his neck out again.

Amid the countless inmates out to get him, Yo-han finds a person willing to take a chance on him. He makes his debut in the prison’s underground casino.

Yo-han sharpens his skills with the help of a mysterious guru next door. As he works his way up, he sets his sights on entering the big leagues.

Jang Seon-o takes Yo-han under his wing. Song Du-cheol demands payment in blood. Oh Su-yeon seeks to form an alliance.

Seon-o asks Yo-han to spy on his behalf. Su-yeon investigates the death of Yo-han’s grandmother and its connection to an officer’s suicide.

Seon-o teaches Yo-han the art of deception, provided that they team up to play against Yang Jun. No Seung-hwan realizes that he’s been overlooked.