[1] Based on real-life cases, this Korean drama focuses on a group of detectives in the Seoul Gangnam Police Homicide Division who solve crimes with their variety of skills and investigative methods.

At the forefront of the team is the hotheaded detective Park Se-hyuk and the cold, commanding police chief, Jung Il-do.

Se-hyuk's impulsive, act-first-think-later methods, instincts honed on the streets, and pesky habit of threatening resignation clashes with his superior Il-do's strict, by-the-book style.

Before joining the department, she worked as a patrol police and had the nickname cold feet, as she would always freeze in front of criminals and thus lose them.

Kim Seung-woo was originally cast in the role of Jung Il-do, but dropped out for personal reasons a month before the show's premiere and was replaced by Lee Jong-hyuk.