Cha Su-yeol, a police officer who has long despised his mother, the notorious 'Mantis' serial killer, must reluctantly turn to her for help when a copycat killer emerges.
Jeong Yi-shin
Cha Su-yeol
Joong-ho
Na-hee
Lee Jung-yeon
Jung Hyeon Nam [I Sin's father]
Bae Seong Gyu [Detective]
Choi Hyeok [Detective]
Son Ji An [Detective]
Seo A Ra [Jung Yeon's friend]
Seo Gu Wan
Hong Seung Pyo [Police commissioner general]
Kim Eun Ae
Kim U Tae [Security]
Park Eun Bae [Min Jae's father]
Park Min-jae
