Year 2150. The Solar System has been settled and divided among competing factions. Control of the colonies, as before, is carried out by Earth, but the power of the mother planet is weakening.
Ingvar Falk is an agent investigating strange events that occurred on Jupiter. Some force is changing the planet, controlling local forms of life, and making contact with people. Those who managed to communicate with the mighty mind have changed irreversibly—they now obey something foreign and represent a formidable power that has penetrated all levels of governing structures.