Every year, a visit to Spain becomes a kind of tradition for the detective Drongo. Here lives his old acquaintance, Ingrid, and Drongo considers it his duty to visit her at least from time to time. This year, he stayed at one of Valencia’s best hotels—but he couldn’t enjoy peace and quiet. A murder took place in the hotel. Drongo teamed up with a local investigator and soon outlined the circle of suspects. It included the guests who, at the time the crime was committed, had no alibis. And there were seven of them…