A famous guitarist dies while performing live on a stage, and the case is assigned to Neuroscientific Investigation Team as its first assignment. Like it or not, Myung Se is stuck with Ha Ru, and they are to solve the case together. It is the guitarist’s wife who confesses that she’s the murderer. Ha Ru right away recognizes that she suffers from Wernicke-Korsakoff syndrome, and things take an unexpected turn.