This drama tells the story of children who have gained extraordinary intelligence but lack of emotions due to experiments. Because they discovered that a questionable case 26 years ago is related to the current suspense incident, they gather together to conduct an investigation, and smash the conspiracy of the powerful who use them as tools, and find the true meaning of being an ordinary person. Namgoong Min plays the role of investigator Do Jung Woo. Not only does he have his own unique fashion style, he is called a "fashion terrorist" in the police department, but he is also very good at investigation and is a talented investigator. He discovered that the incident 26 years ago is related to the current incident and is a key figure in finding clues to the incident. Kim Seol Hyun plays the role of Kong Hye Won, a guard of the Special Investigation Team of the Seoul Metropolitan Police Agency. She is very talented and beautiful, speaks quickly, and looks like a fox, but is actually a bear. She is cheerful and confident. She is responsible for physical strength, fighting, and drinking in the group. She does not mind the methods and methods for the investigation and is very persistent. Lee Cheong-e plays the role of Jamie Layton, an investigator sent by the FBI, who investigates the secrets of the case with Do Jung Woo. Yin Shanyu plays a mysterious engineer. Although he seems to be unsociable, has mysophobia and obsessive-compulsive disorder, he is actually a person who performs secret tasks on the portal website Modu. @智的追剧生活