Young German woman Emma Wiechert invited the famous detective Drongo to Potsdam for the anniversary of her elderly relative. Emma has known Drongo for many years and is well aware of his unique abilities. That’s exactly why she was more interested than anyone else in having the international expert present at the celebration—just in case. Because women’s intuition told Emma that something extraordinary might happen at the banquet. And she was right: in the middle of the feast, the guest of honor, Marta, was poisoned with a deadly poison.
Drongo immediately begins investigating and quickly understands that the killer… made a mistake.