This is the story of a father who died mysteriously in May of 1980, a mother who lives in the shadows with a bullet in her head and not being able to forget May 18th and their daughter, and the nation's greatest comedian, Hee-soo.

Kim Kkob-bi
as Hee-soo

Kim Bu-seon
as Myung-hee

Jeon Soo-hyun
as Chul-soo

Kim Chae-hee
as Myung-hee (Past)

Lee Han-wi
as Choi Young-chan

Kim Hyo-myeong
as Chul-ho (Past)

Han Da-yeong
as Tae-ja (Past)

Lee Jae-gu
as Chul-ho

Seol Ji-yun
as

Han So-hyeon
as Lee So-mi