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.

• DirectorSang-yong Lee
• Release12 August 2009
• Genre
  Crime / Mystery
• Duration1h 26m
• Budget?
• Revenue?
• Rate
  

  5.864
  22 reviews
• Productions

  Sway Entertainment, Lotte Entertainment