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.

Details

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