A lot of wealthy people came to a luxury hotel in the Spanish resort of Costa del Sol, wanting to relax beautifully. Among these people were three married couples from Russia, Kazakhstan and Armenia. They were connected by a common large business, which was now experiencing another boom. And suddenly, in the midst of a vacation, the head of the company, Mikhail Figurovsky, dies. The Spanish police establish that he was poisoned, but who and why... They cannot find any clues. Luckily for them, the world famous expert Drongo and his wife Jill are vacationing in the same hotel - and it’s not in his rules to ignore another criminal puzzle...