The next test of the Molot intercontinental ballistic missile was unsuccessful. The failed third stage fell into the Laptev Sea. It must be found and raised from the depths - it contains too important and a secret component. But the vessel “Akademik Antonov”, sent to search, disappeared without a trace... Then the command of the Russian Navy urgently sends a group of combat swimmers “Frigate” to the area under the command of captain of the second rank Evgeniy Cherenkov. Arriving at the scene, the specialists discovered that the top-secret component was of interest not only to the Russians...