Synopsis：After winning an international hacking competition, genius hacker Yeongcheon reveals himself as a cold-blooded psychopath. Unable to work with others, he is fired and decides to take brutal revenge, hacking into his boss Mr. Kim’s private life and weaponizing his son’s crime against him. When Mr. Kim dies, Yeongcheon feels exhilaration instead of guilt, spiraling into a deadly addiction to murder. As detectives Hyeonji and Jungyeong pursue him, they are drawn into a shocking conspiracy full of unexpected twists.