The Clue
(2009)
Director:
Lee Sang-yong
Cast:
Yoo Seung-ho, Kang So-ra, Park Cheol-min
tells the story of Jung-hoon, an honor student who is involved in a murder case at his school. After finding his friend, Tae-gyu, murdered, Jung-hoon becomes the prime suspect. Da-jung, a student who believes in his innocence, helps him uncover the mystery and find the real killer before class resumes and the body is discovered.