Audio Format: DD 5.1, DD 2.0
Video Format: Widescreen 1.85:1 (Anamorphic)
Languages: Korean
Subtitles: English, Korean
Region Code: 3
Year Made: 2009
Running Time: 86
Release Date: 11/24/2009
During fourth period, high schooler Da-jeong finds his 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.
