Perfect Number

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.

Thriller Mystery

Ryoo Seung-bum

(Suk-go)

Lee Yo-won

(Hwa-sun)

Cho Jin-woong

(Detective Min-bum)

Kim Yoon-sung

(Sang-joon)

Kim Bo-ra

(Yoon-ah)

Lee Seok-jun

(Nam Tae-woo)

Lim Sung-min

(Jung-sook)

Kwak Min-ho

(Chul-min)

Kwon Hae-hyo

(Team Leader)

Nam Moon-chul

(Director)

Kim Ah-ron

(Girl)

Kim Joo-ryoung

(Madame)

Park Hyoung-soo

(Investigator 1)

Nam Yeon-woo

(Investigator 2)

Lee Kyoo-hyung

(Suk-go (Teen))

Dong Bang-woo

(Innkeeper)

Song Young-chang

(Lie detector investigator)

Choi Young-woo

(Forensic team member #1)