The third book tells the story of the female scientist Karen Tamara. Dramatic circumstances force her to struggle against a cult who is about to maneuver the flying world APEIRON into a disaster. During the exploration of a planet within the star system of 15 Sagittae, where the humans first stumble upon tracks of a lost extraterrestrial civilization, she declares a state of emergency and sets up a matriarchal dictatorship. After returning to the spaceship she orders to anesthetize all men and to start the history fresh from a kind of middle ages.