THE BLUE LOTUS SOCIETY A traveling exhibit of Egyptian artifacts is threatened by thieves. Pinkerton agents, including Ess Fremont, are assigned to protection duty. The thefts of artifacts around the world makes this a priority mission, not just for the sake of antiquity but for diplomatic reasons. A midnight vigil in the Smithsonian Institution's warehouse brings Ess face-to-face with the reason behind the thefts --...