The depths of millennia and the cold darkness of space conceal amazing mysteries. An incredible artifact was discovered on Jupiter's moon Europa, irrefutably proving that humanity is not alone in the Universe. It carries a message that cannot be deciphered. While conducting an investigation, saving an artifact from furious attempts to take possession of it, Earth intelligence agent Richard Snow is forced to hide from an unknown force overtaking him. It becomes clear that the Earth is in mortal danger - the powerful “Web” is carrying out colossal astro-transformations in the Universe that defy human imagination. What a message conceals an ancient artifact, whether earthlings can solve the Riddle carried through millions of years, what the unknown “Web” is, what inevitable contact with it means for humanity - these are the challenges that earthlings will have to answer.