Trying to be good adults might go against the trend of today when it is so difficult to find adults who would willingly take the responsibility, act thoughtfully, and make a sacrifice for the others. And here come two adults who fight against bad adults, and they are Young Jin, a police officer at Seoul Metropolitan Police Agency, and Sun Woo, a teacher at Shinsung Middle School. By showing how the two main characters struggle and fight for what they think is right, Nobody Knows gives questions about the roles of adults for the children who are abandoned and marginalized.

김서형Cha Young-jin

Ryu Deok-hwanLee Sun-woo

Park HoonBaek Sang-ho

안지호Go Eun-ho

Cho Han-chulYoon Hee-seob

윤재용Ha Min Sung

Yoon Chan-youngJu Dong-myung

Seo Yeong-jooKim Tae-hyung

Shin Jae-whiOh Du-seok

민진웅Lee Jae-hong

Park Cheol-minHan Geun-man

Moon Sung-keonHwang In-bum

백수장Park Jin-su

장영남Jung So-yun

Park Min-jungBae Sun-a

Tae Won-seokKo Hee-dong

전석찬Kim Byung-hee

Kwon Hae-hyoJang Gi-ho

강서하Yun Ja Yeong [Seoul police department]

Kim Sae-ronCha Young Jin [Young]

Min Sung-wookKevin Jung

Kang Shin-ilSeo Sang Won

백재우Baek Sang Ho [Young]

장재호Choi Dae Hoon [Ha Min Sung's chauffeur]

하민Jae-min Mother (Eps 1)