Actor Noah Bennett is bound to a "Villain System", earning rewards by portraying villain roles. His acted criminal details match a real serial homicide case, causing the Major Crimes Unit captain to mistake him for the killer and arrest him. To prove his innocence, Noah cooperates with police, using the System's plot to deduce the killer's patterns. He discovers the killer targets those who escaped legal punishment, with habits like touching earlobes and standardized hand-washing.