A peaceful research vessel studying strange weather anomalies perished in the Indian Ocean. The investigation into the causes of the disaster was assigned to Kurt Austin from the legendary National Undersea Research Administration. Having studied the facts, he was convinced that it was not an accident that killed the team. Scientists have crossed the path of a mad inventor who has developed a grandiose plan: to fill the oceans with myriads of nanorobots, with their help to control the movement of currents and winds, and then sell the rain to those countries that will pay the most, punishing the disobedient with drought. How to stop the rain thief if a voracious swarm of microscopic machines is already swarming in the ocean depths? The enemy is dangerous, but Kurt Austin is ready to challenge him...