Seol Chungwon, an investigator with the Narcotics Division under the Korea Customs Service, is conducting an undercover operation to track down the distributors of a new drug called Pink Out, which has recently started circulating in Korea. During the investigation, he encounters a mysterious man named Baek Young, who claims he can show him the drug’s effects and leads him into a back room. Though Chungwon manages to stall until the police arrive, the dealers have already fled the scene, leaving only Baek Young behind as the sole clue. Despite repeated testing, Baek Young shows no traces of the drug in his system. After much deliberation, Chungwon decides to take the seemingly clueless young man home with him. However, the 21-year-old acts as if he’s been shut away from the world, showing little social awareness or restraint. Determined to uncover the truth about Pink Out, Chungwon begins to coax and test Baek Young in every way he can…

Original Webtoon