The fourth book in the series of adventures of Captain Future - a space superhero from the future, a genius of science and technology, an adventurer and the most implacable crime fighter of all times. On the planets of the Solar System, an active underground trade in “living water” has developed, allowing one to preserve youth . But if you miss the next dose, rapid aging and death will occur. More and more people are becoming dependent on the drink. At the head of the trading syndicate is the Lord of Life, whose face no one has ever seen. The interplanetary police were thrown off their feet in search of the criminal. The President of the Solar System turned to Captain Future for help...