To escape the shots of a mysterious attacker, Jinshi and Mao Mao are forced to take refuge in a cave... As they try to get out, a certain closeness and an unfortunate gesture lead the apothecary to discover the eunuch's long-kept secret.
Meanwhile, Basen and Gaoshun strive to find their master as well as his assailant. The investigation might take a new turn thanks to the hunting dog Lihaku takes care of...