A young German woman, Emma Wichert, invites 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 this international expert attend the anniversary.
As they say, for every fire. Because a woman’s intuition told Emma that something extraordinary could happen at the banquet. And the young woman was right: at the height of the festivities, the honoree, Marta, was poisoned with a deadly poison. Drongo immediately begins investigating and at once understands that the killer… made a mistake.