Vice Principal
High school student Sohee starts job training at a call center, but she faces pressure of greedy company. Detective Oh Yu-jin, who has something in common with Sohee starts to follow traces to reveal the truth.
Section Chief Choi
An ace police crisis negotiator, Chae-yoon, is called to the scene where her supervisor is taken hostage. Through the control room monitor, she is faced with the cold-blooded hostage taker, Tae-gu, whose demeanors are difficult to interpret. Against the 21-hour deadline Tae-gu has set, Chae-yoon tirelessly tries to crack the unusually calm perp over multiple video-calls. Eventually, the shocking truth begins to unveil.
Superintendent
In a DVD-themed sex hotel, a young employee has hidden drugs in room #7 for criminals in exchange for wiping off his debt. But then his boss hides a dead body in the same room and locks the door. And a dangerous battle of wits ensues between a man who must lock away the secret behind the door, and another, who must go inside.
Jumsoon (52) works two jobs in order to live with her recently discharged son, Yonggoon (24). She works at a restaurant during the day and sells her body on Sowol Road during the night. One night on Sowol Road, Jumsoon saves another sex worker from an assault and learns that she is a transgender woman that wants to have a sex reassignment surgery.
Min-kyu's father
Ji-eun goes to Min-kyu's house to celebrate their second anniversary with her boyfriend Min-kyu. But Min-kyu notifies Ji-eun of parting. Unable to accept a sudden breakup, Ji-eun starts a strange cohabitation with Mingyu's family without leaving the place.
Priest Jang
Jae-ho, who aims to become the number one in a crime organization, gets to build up trust with Hyun-su, an ambitious newbie in the prison. While they try to take over the organization after the prison release, their ulterior motives starts to emerge.
Store manager
In response to a sudden dismissal of staff, workers at a big retail store begin a protest against their employer's oppressive labor policies.
Mr. Im
A seemingly happy family gets rocked by the suicide of the 14-year-old daughter.
Um Tae-nam
In the early 1980s, South Korea is torn by student protests over the lack of representation in the government. Song Woo-Seok is a successful attorney in Busan specializing in tax law. His views regarding civil liberties are changed by student activist Park Jin-woo. When Jin-Woo is brutally tortured and put on trial for his activism, Woo-seok decides to defend Jin-woo as his client.
family member
A gay man and a lesbian pretend to be in love to appease their parents.
Mr. Koo
When Seung-min was on his first year at the Academy of Architecture, he met Seo-yeon. She was a musician student, and Seung-min totally fell in love with her. Years have passed, and now he meets Seo-yeon again - she asks him to rebuild her father's old house.
Wan-deuk's Father
A deadbeat teacher helps an angry, aimless teenager find direction in life during his final year of high school.
Regional Police Chief
Two spies share a secret bond, despite their loyalties. A North Korean assassin is sent to Seoul to kill a dissident, but instead he teams up with a South Korean agent in search for revenge.
Go-ni's Uncle
Go-ni tries his best to worship Pyung Gyung-jang as his teacher, and promises to stop gambling after winning his money back. But people's desires are endless.
Politics & Economics Teacher
A model student transfers to the notorious Jungmoon High School known for its severe corporal punishment by teachers and power struggles between school gangs.
Colleague 4
In the spring of 1999, a group of old friends gather to celebrate their 20 year reunion. Among the group is Yeong-ho, a cold, unhappy man, whose demeanor puts a damper on the festivities. The seriousness of Yeong-ho's depression becomes apparent when he climbs a railroad bridge and looks like he might jump. At this crucial moment, memories of seven crucial episodes from Yeong-ho's past flood his mind.