Myeong-jun and Ro-hee find themselves in Choi Jin-tae's villa. Myeong-jun learns of "The Genius Child Project," a brain experiment Ro-hee was a subject in. Dr. Mo attempts to separate Ro-hee and Myeong-jun. Meanwhile, Sang-yun digs into a case from 30 years ago to catch the culprit of the hospital director and his wife's murder case and hears an unexpected name from a witness of a past case.
Yoon Kye-sang
Kim Myeong-jun
Jeon Yu-na
Choi Ro-hee
Park Sung-hoon
Park Sang-yoon
Kim Shin-rock
Seo Hye-eun
Kim Sang-ho
Park Cheol-won
Seo Jae-hee
Mo Eun-seon
Kang Young-suk
Jaden
Choi Eun-woo
Kim Hee-ae
Jeon Kwang-jin
Choi Jin-tae
Go Ha
So Jin-yoo
Woo Ji-hyeon
Choi Taek-kyun
Kim Dong-won
Ho-young
Jung Soon-won
Chae Jung-man
Oh Seung-jun
Kim Myung-joon (Young)
