No one, except the authors of this bestseller and heads of special services privy to state secrets, knows that in Russia there is a last stand detachment whose duty is to save the world. One of them, warrant officer Anatoly Hutchish (power - ten megatons), is ordered to perform a feat: to find and neutralize the terrible installation X, located on one of the ships of the Black Sea Fleet. This novel is about the most terrible secret of the twentieth century, which is called the Mystery of the Black Sea.< /p>