In the series "The Return of Sinbad," the events revolve around the enigmatic employee of Russian special services, Elena Ozerskaya. For several years, she worked in the Middle East and, under cover, was married to one of the most dangerous arms dealers in the world. He supplied terrorist organizations with ammunition worldwide. But when Ozerskaya's husband suddenly died, she herself took over the structure he had created and lost contact with her superiors. A team is sent to search for Elena.