With help from a young woman with synesthesia, a cop who lost his sense of pain tracks down the serial killer who brought tragedy to both their lives.
Park Yoo-chun
Choi Mu-gak
Shin Sae-kyeong
Oh Cho-rim / Choi Eun-seol
Namkoong Min
Kwon Jae-hui
Yoon Jin-seo
Yeom Mi
Song Jong-ho
Cheon Baek-gyeong
Lee Won-jong
Kang Hyeok
Choi Tae-joon
Ye Sang-gil
Jo Hee-bong
Gi Chung-do
