Suspected of being a serial killer, a detective from the homicide squad embarks on a relentless pursuit to uncover the identity of the true culprit and clear his name.
EPISODE 1
Crazy Dog
Student Baek Ji-eun is kidnapped and killed; detective Sung-jun investigates and identifies a suspect; his brother, Judge Sung-hoon, presides over the case; the court is uncertain about the suspect's guilt.
EPISODE 2
Episode 2
Man-chun is found guilty and sentenced to life in prison; when everyone thinks the case is closed, he escapes during transport; Man-chun searches for jurors, intending to seek revenge.
EPISODE 3
The Children Who He Abandoned
Sung-jun recovers from injury after a hostage situation; he faces his parents' complaints and news of another murder; the public suspects a copycat; Sung-hoon believes Man-chun is innocent.
EPISODE 4
A Very Old Future
Ki-nam and Moon-kang link the cases to Hope Welfare; their search for their daughters' killer leads them to suspect Sung-jun is Jung Yoon-jae; Moon-kang kidnaps Sung-jun.
EPISODE 5
A Certain Promise
Sung-jun escapes Moon-kang with Eun-ki's help; she believes in his innocence; despite public and police certainty of his guilt, Sung-jun must prove his innocence while evading his colleagues.
EPISODE 6
Your Enemy Is Closest to You
Sung-hoon doubts Sung-jun's guilt due to lack of evidence and new findings; Kwon Yu-na is attacked by Choi Soon-gil, a suspect in Yeom Hye-jin's murder; Sung-jun investigates Choi further.
Ok Taec-yeon
Ha Seok-jin
Jeong Eun-ji
Kim Ha-Kyun
Choi Hong-il
Cho Kyeong-sook
Cho Yeonhee
Shin Yong-hwi
Kim Sung-min
Kwon Gi-kyung
