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.
Go Hyun-jung
Jeong Yi-shin
Jang Dong-yoon
Cha Su-yeol
Cho Seong-ha
Joong-ho
EL
Na-hee
Kim Bo-ra
Lee Jung-yeon
Lee Hwang-eui
Jung Hyeon Nam [I Sin's father]
Kim Min-ho
Bae Seong Gyu [Detective]
Kim Tae-jeong
Choi Hyeok [Detective]
Park Wan-Hyeong
Son Ji An [Detective]
Han Dong-hee
Seo A Ra [Jung Yeon's friend]
Lee Tae-gu
Seo Gu Wan
Lee Yoon-geon
Hong Seung Pyo [Police commissioner general]
Han Si-Ah
Kim Eun Ae
Kil Eun-sung
Kim U Tae [Security]
Cha Soon-bae
Park Eun Bae [Min Jae's father]
Lee Chang-min
Park Min-jae
