Johann Friedrich von Allmen, a bon vivant of dandified refinement, has exhausted his family fortune by living in Old World grandeur despite present-day financial constraints. Forced to downscale, Allmen inhabits the garden house of his former Zurich...

An unimaginably valuable pink diamond has gone missing and a mysterious Russian residing in Switzerland is suspected of having made off with the treasured jewel. But the investigative duo of Johann Friedrich von Allmen and his Guatemalan butler...