Together with Takaarrath, the seemingly last descendant of the Neensziss people, Marvin reaches the planet Venus and arrives in the 'City of a thousand stars'. There it comes to alienation between Takaarrath and the central security autocracy, the autonomously acting hadron brain GLEESITT. For Marvin, the question often arises of what really happened in the solar system over 200 years ago and where the builders of GLEESITT were now.