Plot
A children's mystery drama about four kid detectives solving various cases happening at school.
Cast
Kim Ji-min
as Kang Ha Ra
Tang Joon-sang
as Lee Seo Jin
Yoon Chan-young
as Lee Woo Jin
Yoo Jun
as Choi Dong Yeong
Park Si-eun
as Jin Sun Mi
Heo Jung-min
as Choi Gi Chan
Kim Myung-soo
as Kang Suk
Uhm Hyun-kyung
as Song Soo Ji
Choi Shang
as Teacher Ma