On March 26, 1991, five boys set off to the mountain to go frog hunting and never come back to their family. While a documentary producer, detective and professor try to solve the mystery of the incident, one of the boys' parents is a suspect.
박용우
as Kang Ji-seung
류승룡
as Hwang Woo-hyuk
성지루
as Jung-ho's Father
김여진
as Jung-ho's Mother
성동일
as Park Kyung-sik
박병은
as Kim Joo-hwan
Kim Koo-taek
as Won-kil's Father
박미현
as Won-kil's Mother
이상희
as Yong-duk's Father
Seo Ju-hee
as Yong-duk's Mother
Jo Deok-jae
as Dong-pil's Father
서영화
as Dong-pil's Mother
