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
University student Baek Ji-eun is abducted and murdered. Sung-jun leads the investigation, while his brother Sung-hoon serves as the judge. Uncertainty surrounds the identified suspect, leading to a high-profile trial that captures public interest.
EPISODE 2
Episode 2
Following a guilty verdict, Man-chun receives a lifetime prison sentence. However, he escapes and seeks revenge on the jurors. Yet, his pursuit of vengeance proves fruitless as the truth behind the Joker Murder case comes to light.
EPISODE 3
The Children Who He Abandoned
After recovering from the hostage incident, Sung-jun is greeted by his parents' nagging and news of another murder. Though the public suspects a copycat killer, Sung-hoon suspects Man-chun's innocence and a deeper conspiracy behind the Joker cases.
EPISODE 4
A Very Old Future
Jurors become targets of the Joker murderer. Ki-nam and Moon-kang connect cases to Hope Welfare, seeking justice for their daughters. Suspicion falls on Ryu Sung-jun as Moon-kang kidnaps him, convinced he's Jung Yoon-jae.
EPISODE 5
A Certain Promise
With Eun-ki's aid, Sung-jun escapes Moon-kang's clutches. Determined to prove his innocence in the Joker Murders, Eun-ki stands by his side, despite public and police accusations. Pursued by his colleagues, Sung-jun sets out to uncover the truth.
EPISODE 6
Your Enemy Is Closest to You
Sung-hoon doubts Sung-jun's guilt, citing insufficient evidence and emerging new clues. Kwon Yu-na falls victim to Choi Soon-gil's attack, prompting Sung-jun to investigate him further due to his connection to Yeom Hye-jin's murder.
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
