4th Period Mystery
4교시 추리영역
4th Period Mystery 123Movies. 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.
- Genre: Crime, Mystery, Thriller, Action
- Country: South Korea
- Director: Sang-yong Lee
- Cast: Yoo Seung-ho, Kang So-ra, Sang-geun Jo, Jeong Seok-yong, Jeon Jun-hong, Lee Yeong-jin, Kim Dong-beom, Jo Yun-hei, Lee Chan-ho, Im Soo-hyang, Jung Young-ki, Park Cheol-min, Oh Jin-ha, Kim Min-su,
