Kang Bit Na, an elite judge with a beautiful appearance, is a demon whose mission is to punish those who have wronged others and send them to Hell. However, the righteous Detective Han Da On is determined to change her ways.
Professor Jasper Tempest, a genius Cambridge University criminologist with OCD and an overbearing mother, assists the police in solving crime.
Paralyzed police veteran Robert T. Ironside becomes a special consultant to the force.
After fifteen years missing, police officer Conall Ó Súilleabháin's murdered mother, Sabine, is found buried in a bog. Forbidden from investigating the crime, he has to join forces with a citizen-journalist to get justice for his mother.
Dr. Mark Sloan has a knack for getting into trouble, negotiating the twists and turns of mysteries and solving crimes with the help of his son, Steve, a homicide detective.
After a long-serving cop and a teenage girl fall to their deaths from a London tower block, Detective Sarah Collins investigates the dark heart of policing.