School principal Mahesh Sidana, avid butterfly collector and founder of an elitist top-IQ society, is the first victim of a series of weird murders with an MO evoking the fate of caught insects. While Barnaby's Danish colleague-friend, detective Birgitte Poulsen, goes undercover in the IQ club, an interest of hers since her father's death, Barnaby and Jamie Winter follow other ... (展開全部)