After his successful first "case", Allmen decides to make finding lost art objects his profession and thus avoid financial misery in the future.

Allmen and the Pink Diamond

Ironically, the art detective Johann Friedrich von Allmen is staying in a high-end Zurich hotel when a million-dollar dahlia painting disappears from the private suite of the owner. What would be more obvious to the eccentric Dahlia Gutbauer than to entrust "Allmen International Inquiries" with the discreet replacement?