The instruments of the great Cremonese master Antonio Stradivari are capricious, with their own character, they cannot be confused with any others. Rumor attributed magical properties to violins. They even said that they were the product of a secret union between the master and the devil himself... The young Moscow violinist Robert Ivanov lost his head in love with the social beauty Anechka Li and briefly left unattended an antique violin that was treasured by several generations of the Ivanov musical clan. The priceless instrument mysteriously disappeared, but soon resurfaced in New York, where a certain Mr. Ebdon Lamb tried to insure it, calling himself the owner of the rarity. Ivan Stark, an expert in finding lost works of art, gets involved in this strange story to find out who the real owner is violins. Soon he no longer knows whether to believe in the existence of evil spirits or investigate a grandiose scam, the mechanism of which was launched several centuries ago.