Johann Friedrich von Allmen and his partner Carlos get caught up in a new adventure in which the disappearance of a very valuable koi plays a crucial role.
Includes: Allmen and the Pink Diamond, Allmen and the Dragonflies, Allmen and the Mystery of the Dahlias, Allmen und das Geheimnis der Erotik, Allmen und das Geheimnis des Koi