Korean emperor Lee Gon tries to close the doors to a parallel world which was opened by demons; a detective tries to protect the people and the one she loves.

Hwang Shi Mok underwent brain surgery as a child to curb his violent temper, which left him devoid of emotions. Hwang becomes a prosecutor known for his piercing intelligence and logic, but he is ostracized because he lacks empathy and social skills. He is also one of only a handful of upright prosecutors who have refused to take bribes. One day, he encounters a stabbing victim while investigating corruption. He meets Lieutenant Han Yeo Jin at the crime scene. They join forces to root out corruption at the prosecutors’ office and solve a serial murder case.

Once guiding the 'dead', now saving those who want to die! The Afterlife Office Human Fantasy.

Do Bae-man became military prosecutor only to make more money and be successful. On the other hand, Cha Woo-in, recently joining Bae-man’s team, became one for her revenge. As these two different purposes shows, the two have very different backgrounds and personalities. However, as they work on the same case, Bae-man and Woo-on help each other and even grow together as fine military prosecutors.

A former special forces soldier delivers revenge for victims of injustice while working for a secret organization that fronts as a taxi company.