Children...

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.

• 
  Lee Kyu-man
• 
  Choe Won-kyung
• 
  Na Jun-o

• 
  Park Yong-woo
  Kang Ji-seung
• 
  Ryu Seung-ryong
  Hwang Woo-hyuk
• 
  Sung Ji-ru
  Jung-ho's Father
• 
  Kim Yeo-jin
  Jung-ho's Mother
• 
  Sung Dong-il
  Park Kyung-sik
• 
  Park Byung-eun
  Kim Joo-hwan
• 
  Kim Koo-taek
  Won-kil's Father
• 
  Park Mi-hyeon
  Won-kil's Mother
• 
  Lee Sang-hee
  Yong-duk's Father
• 
  Seo Ju-hee
  Yong-duk's Mother
• 
  Jo Deok-jae
  Dong-pil's Father
• 
  Seo Young-hwa
  Dong-pil's Mother
• 
  Nam Sang-baek
  Chul-woo's Father
• 
  Lee Ui-soo
  Chul-woo's Mother
• 
  Jeon Kuk-hwan
  Professor Cha
• 
  Park Seo-yeon
  Jin-yeong
• 
  Woo Young-taek
  Remains Finding Reporter
• 
  Oh Dong-ju
  PD Kim
• 
  Kim Jae-heum
  Class Monitor