Synopsis
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. He works diligently for a food franchise company and is a loving husband and father to his family. Goong-chul's wife, Nam Jung-hae (Song Yoon-ah) is a psychiatrist who works in a family hospital. She is intelligent and beautiful but hides a dark past from her husband. Jung-hae gets tangled in a blackmailing scheme.
Jung Jae-hoon (Bae Soo-bin) is a divorced urologist with a wealthy family background. He lives alone and seems to have a mysterious side. He has a past connection to Nam Jung-hae, of which Ahn Goong-chul doesn't know about.
Jo Hyung-woo (Kim Sung-oh) is an adult film director who is often mockingly called the "Bong Joon-ho" of adult film industry. His dream is to become a mainstream big budget film director but never had any luck with it. He is married to Kang Kyung-ja (Kim Hye-eun) who is a former adult film actress and now runs a luxurious bar. He is very depended on his wife's income. Kang Kyung-ja has a pro-golfer son named Kang Ji-wook.
Park Choon-bok (Jung Suk-yong) is an insurance company worker and part-time foreign car dealership worker. His wife Yoo Eun-sil (Lee In-hye) is a housewife and they have a daughter named Park Pu-reum. He looks comparatively older than his friends and wife, and people often mistake him as his daughter's grandfather. He struggles financially but his wife is very supportive.
Cheon Man-shik (Kim Won-hae) is a City Hall Tax Collection Division official with a wife and a teenage daughter. He is quiet and polite and suffers from depression. He and Ahn Goong-chul were roommates in college and consider each other best friends. He has been hiding a secret from his family and friends which is revealed only after his death.
Baek Hae-sook (Han Eun-jung) used to be friends with the five and they all used to have a crush on her in college. Due to some circumstances, she had to drop out of college and wasn't in touch with any of them until Man-shik's funeral. She bought a restaurant near the housing society where the five friends live, and seems to have a mysterious agenda.
