S04E07: 28 Years Ago

Kang Man Ho’s father, Kang Seok Chun, is supposedly dead on paper. However, he is still alive, and his hidden story comes to light. Meanwhile, Derek hears the truth from Director Yang about his mom’s death 28 years ago. Also, Woo Ju sets up a trap online to catch the Circus Man. Meanwhile, a mysterious user approaches him.

Season 4

Lee Ha-na
Lee Ha-na
Kang Kwon-ju
Song Seung-heon
Song Seung-heon
Derek Jo
Son Eun-seo
Son Eun-seo
Park Eun-soo
Kang Seung-yoon
Kang Seung-yoon
Han Woo-joo
Kim Jung-ki
Kim Jung-ki
Park Joong-ki
Song Boo-gun
Song Boo-gun
Goo Gwang-soo
Baek Sung-hyun
Baek Sung-hyun
Shim Dae-sik
Kim Jae-uck
Kim Jae-uck
Mo Tae-gu