Season 1

Jung Hae gets ready to go out to a host bar, and Goong Chul goes to High Five Chicken's 1,000th store opening. On her way out to work, Jung Hae almost gets into an accident with a motorcycle. Later, that rider ends up being her golf instructor. Meanwhile, Goong Chul and the boys meet up for drinks, not realizing it could be the last time for one of them.

Man Shik dies of a heart attack. All of his friends gather to mourn for him, and to everyone’s surprise, Hae Sook comes to the funeral. Meanwhile, Myung Sook finds out Man Shik’s dark secret, and she calls Goong Chul to share the secret.

Jung Hae wakes up naked in bed, and Kang San stands over her without the slightest bit of fear. Although she leaves unharmed, she struggles mentally with the incident and gets continually harassed by him. Meanwhile, Goong Chul becomes suspicious of her disappearance and tries to get her to talk. Later, Goong Chul receives a text message with pictures of Jung Hae naked in bed.

Jung Hae begs Goong Chul to let her deal with Kang San, but the moment he sees him, he can't control his anger and attacks him. He stops at Jung Hae's plea, but the rage inside doesn't subside. Meanwhile, Kyung Ja tries to help her husband Hyung Woo seal the deal with a big shot movie producer.

Ju Kang San is found dead in his bathroom shower with traumatic injuries to his head. The only suspects the police have are Goong Chul and his wife. However, without hesitation, Goong Chul admits to killing Kang San, but the police don't buy it and let him go. Meanwhile, Jung Hae sees Kang San's murder on the news.

Jung Hae tells the police everything that happened the night Ju Kang San got murdered. Although she is innocent, the police still keep her for questioning, driving Goong Chul mad. To save his wife from any criminal charges, Goong Chul and his friends try to find a way to clear her name. Meanwhile, Jae Hoon meets with his older brother and asks for a favour.

The past returns putting Goong Chul and Jung Hae in another dilemma. Baek Hae Sook, Goong Chul's first love, returns to the neighbourhood and takes over The Outlaw Wilderness with money borrowed from Goong Chul. Everyone is surprised at her sudden appearance, especially Jae Hoon, who makes a proposal to her in secret. Meanwhile, the police try to connect Professor Han Eung Shik's death to Goong Chul.

Jae Hoon's ex-wife shows up from nowhere, and Kyung Ja meets with the sleazy Mr. Park for Hyung Woo's sake. Goong Chul and the boys get polished up to help Hae Sook with her bar's opening day. However, the wives get words of this and head over to crash the party. Meanwhile, Jung Hae mourns her mother's passing.

Goong Chul starts to find out something is off about Jung Hae’s behaviour and starts to doubt her. When he confronts her about it, they get into a fight. Jae Hoon talks to Jung Hae about their past, and Jung Hae warns him about what will happen if he continues on with his antics.

Goong Chul finds out that Hae Sook has been deliberately orbiting around him and his wife because of what Jung Hae did in the past. He starts to rethink every conversation he shared with Jung Hae. Meanwhile, each of the guys in Goong Chul’s circle faces a tough week. All four of them will soon have to make a new decision about life.

A two-day seminar tests unresolved feelings. During police questioning, Seo Ju-won tells all about the brains behind Gang-san's criminal behavior.

In front of detectives, Jae-hun tells his story of the night of the murder. Jeong-hae starts to piece together a link between her latest misfortunes.

As history repeats itself, present-day relationships reach their breaking points. Hae-suk makes amends with Jeong-hae before it’s too late.

When an innocent life is jeopardized, present and former friends are forced to put aside differences and reevaluate priorities.

When a suspect surrenders as Gang-san's killer, police scramble to find a missing piece of the puzzle. Hae-suk bids farewell to her past.

Park Chun-bok opens up about his future fears. Hyeong-u shares a past regret. Jae-hun's ex-wife makes a surprising confession before her departure.

Jae-hun comes face-to-face with his sins. After making amends with their pasts, Gung-cheol and Hyeong-u's families embrace changes.