
To him the only unsolvable equation was love.
A brilliant math teacher formulates the perfect cover-up after his neighbor murders her abusive ex-husband.
Ryoo Seung-bumSuk-go
Lee Yo-wonHwa-sun
Cho Jin-woongDetective Min-bum
Kim Yoon-sungSang-joon
Kim Bo-raYoon-ah
Lee Seok-junNam Tae-woo
Lim Sung-minJung-sook
Kwak Min-hoChul-min
Kwon Hae-hyoTeam Leader
Nam Moon-chulDirectorKim Ah-ronGirl
Kim Joo-ryoungMadame
Park Hyoung-sooInvestigator 1
Nam Yeon-wooInvestigator 2
Lee Kyoo-hyungSuk-go (Teen)