Insider

Top Cast

Kang Ha-neul as Kim Yo-han
Lee You-young as Oh Soo-yeon
Heo Sung-tae as Yoon Byung-wook
Kim Sang-ho as Mok Jin-hyung
Kang Young-suk as Jang Seon-oh
Park Seong-geun as Hong Sang-wook
Kang Shin-hyo as Hong Jae-seon
Jeong Man-sik as Yang Hwa
Kim Si-eun as Park Ro-sa
Sung Ji-ru as Heo Sang-soo

Seasons

Season 1 (2022)

When a judicial apprentice goes behind bars while on an undercover job, he uses his instincts to survive and get revenge.

Episodes:

Ep. 1: Episode 1 (2022-06-08)

At a high-end gambling house, skilled judicial trainee Kim Yo-han risks more than he can afford as Mok Jin-hyeong pushes him to bet even higher.
Ep. 2: Episode 2 (2022-06-09)

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.
Ep. 3: Episode 3 (2022-06-15)

Yo-han hones his gambling skills under the masterful guidance of a mysterious neighbor. As his confidence grows, he begins to target higher-stakes games.
Ep. 4: Episode 4 (2022-06-16)

Jang Seon-o begins mentoring Yo-han, while Song Du-cheol seeks retribution. Meanwhile, Oh Su-yeon moves to form a strategic alliance.
Ep. 5: Episode 5 (2022-06-22)

Seon-o asks Yo-han to spy for him, while Su-yeon investigates the mysterious death of Yo-han's grandmother and its connection to an officer's suicide.
Ep. 6: Episode 6 (2022-06-23)

Seon-o promises to teach Yo-han the art of deception if he helps him take on Yang Jun. Meanwhile, Nam Dae-mun sees an opportunity to take power.
Ep. 7: Episode 7 (2022-06-29)

Yo-han finds a man who may be the key to tracking down his grandmother's killer. Hong Jae-seon monitors Su-yeon and blocks her investigation.
Ep. 8: Episode 8 (2022-06-30)

Yo-han uncovers the secret forces aligned with the Yang brothers. Meanwhile, Jae-seon searches for legal grounds to raid the prison.
Ep. 9: Episode 9 (2022-07-06)

Pinned for murder and running out of options, Yo-han pledges his loyalty to Do Won-bong. Jin-hyeong cuts a deal with Yoon Byeong-uk.
Ep. 10: Episode 10 (2022-07-07)

Yo-han plays cards against the stockholders of a cosmetics company to sweep up their valuable shares and earn an invitation to a VIP after-party.
Ep. 11: Episode 11 (2022-07-13)

Yo-han navigates setbacks and close calls as he executes a multilayered scheme to escape from the casino and seize a massive slush fund.
Ep. 12: Episode 12 (2022-07-14)

After expanding his network and influence, Yo-han pursues his next target. Seon-o gets a chance to settle the score. The Goldman Casino cleans house.
Ep. 13: Episode 13 (2022-07-20)

Yo-han proposes an irresistible offer to Byeong-uk — with a catch. When Su-yeon finds out, their difference in opinion strains their relationship.
Ep. 14: Episode 14 (2022-07-21)

Yo-han builds strategic ties with government insiders, while Su-yeon maneuvers to strengthen her standing in the casino by aligning with former enemies.
Ep. 15: Episode 15 (2022-07-27)

The new boss in Macau targets Yo-han. Meanwhile, Cho Hae-do takes a hostage and the Yang brothers use intimidation to claim the manager's position.
Ep. 16: Episode 16 (2022-07-28)

Byeong-uk faces judgment, unaware of the consequences that await him. Yo-han offers his final opponent a last chance to turn himself in.