[2][3] The peaceful life of a group of friends who have known each other for 20 years is suddenly broken when a murder takes place.

Ahn Goong-chul (Yoo Jun-sang) has a seemingly perfect life with his beautiful wife and son.

Goong-chul's wife, Nam Jung-hae (Song Yoon-ah) is a psychiatrist who works in a family hospital.

He is married to Kang Kyung-ja (Kim Hye-eun) who is a former adult film actress and now runs a luxury bar.

His wife Yoo Eun-sil (Lee In-hye) is a housewife and they have a daughter named Park Pu-reum.

Cheon Man-shik (Kim Won-hae) is a City Hall Tax Collection Division official with a wife and a teenage daughter.