January 1894. In the Arbat part of Moscow, a rich widow was found dead in a closed house. Dead or murdered? A question that hides the rebus. To solve it, you need to remember: the rebus picture has many meanings. Moscow detective official Alexei Pushkin and brilliant thief Agatha Kern enter a big game that began with a long-standing crime. They have to reveal the secret of the house on Bolshaya Molchanovka, unravel the secret of underground roulette and get into family secrets. The stakes are extremely high. It is almost impossible to win the terrible roulette of fate.