Ji-O has a special power and a secret, but he doesn't know who he really is. He is chased by mysterious figures, while he tries to find answers to numerous questions that surround him. Goo-Reum is a detective. When she decides on a course of action, she won't change no matter what. Her parents disappeared when she was only a young child. Goo-Reum chases after the truth behind her parents' disappearance. She meets Ji-O and her life changes.

A tragic accident leaves an ambitious prosecutor with the mind of a child – forcing him and his mother to embark on a journey to heal their relationship.

Set in the turbulent times of South Korea between the ’80s and ’90s, it depicts the fierce life, revenge, and conflict of young people who have to pursue power and wealth by any means in an era filled with wrong social values. Lee Doo Hak is a young man who was born in a small city in Jeolla Province and grew up innocent with a clever brain. However, he fatefully becomes caught in a whirlpool of events and ends up in the middle of conflict. After going through a real estate fraud group, he becomes a “political gangster” and lives his life to avenge his father’s unjust death.

Children who live in hiding with superpowers, along with their parents who live with painful secrets of the past, face enormous dangers together.

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.

When unidentified parasites violently take over human hosts and gain power, humanity must rise to combat the growing threat.