Dong Soo and Shi Hyun investigate a case from 20 years ago and race to stop Do Jin.
Rain
Kang Dong-Soo
Lee Sun-bin
Yoo Shi-Hyun
Lee Dong-gun
Kim Do-Jin
Jung Jin-young
Jang Tae-Joon
Kang Shin-il
Moon Jae-Hyun
Im Hwa-young
Oh Young-Sim
Yoo Da-in
Min Ji-Soo
Lee Seung-joo
Yoo Shi-Joon
Park Doo-sik
Jung Il-Soo
Son Jong-hak
Park Ki-Moon
Lee Hae-yeong
Baek Woo-Jin
Jeong Soo-young
Kim Sun-Mi
Kim Hee-jung
Shi-Hyun's mother
Jang Seo-kyung
Lee Jin-yeong
