Many wealthy people gathered in a luxury hotel at the Spanish resort of Costa del Sol to take a beautiful vacation. Among them were three married couples from Russia, Kazakhstan, and Armenia. They were connected by a large shared business, which was now experiencing another upturn. And suddenly, in the middle of the holidays, the company’s head, Mikhail Figurovsky, dies. Spanish police establish that he was poisoned, but they can’t figure out who and why… They can’t find an ending to it. Luckily for them, the world-famous expert Drongo is also staying at the same hotel with his wife, Jill—and it’s not in his nature to ignore another criminal puzzle…