Description:This drama portrays a suspenseful romantic story where the protagonists had gained high intelligence through an experiment but lost their emotions. Due to mysterious incidents, they join hands to investigate and fight to seek the truth. Namgkoong Min plays an outstanding investigator and key figure in uncovering clues, who discovered that the current incident is related to a case 26 years ago. Kim Seol-hyun plays a talented and beautiful security guard who is obsessed with the investigations and is the fighter and drinker of the group. Lee Chung-ah portrays an FBI investigator, while Yoon Sun-woo plays a mysterious engineer with a secret mission.
