Released:
2009-08-12

Overview:
During fourth period, high schooler Da-jeong finds her classmate Tae-gyu dead in a classroom and Jeong-hun standing in front of him with blood on his clothes. In order to stop Jeong-hun from becoming the prime suspect, Da-jeong must help him find the real murderer, who is still inside the school building, under 40 minutes before period four ends.

Director:
Sang-yong Lee

Runtime:
1h 26min

Genre:
Crime, Mystery, Thriller, Action

• Cast:
• 
  Yoo Seung-ho
  as
  Han Jung-hoon
• 
  Kang So-ra
  as
  Lee Da-jeong
• 
  Sang-geun Jo
  as
  Kim Tae-gyoo
• 
  Jeong Seok-yong
  as
  Kang Gook-man
• 
  Jeon Jun-hong
  as
  Embassy