The action of this adventure film follows a real-life story.
A Soviet vessel was carrying a cargo of the opium for pharmacological industry. The present-day pirates, going after a rich loot, had treacherously captured the ship and its crew. Unwilling to leave any witnesses of their armed assault, the pirates tried to eliminate the whole crew. A fierce mid-ocean fight ensued between a handful of Soviet sailors and the modern-day bandits that knew no mercy.
The well-known karate specialists participated in the shooting. Judging by box-office figures, at the time of its release the film had been viewed by every third moviegoer.