A serial killer who murdered 17 people. Is he a monstrous killer, or a savior holding the cure for humanity?
Ryeoun
Lee Woo-gyeom
8 episodes
Sung Dong-il
Park Han-jun
Keum Sae-rok
Cha Yi-yeon
Ko Kyu-phil
1 episode
Shin Seung-hwan
Yoon Chae-na
