The little prince and the fox's next planet is inhabited by the Lythians, a mineral people of recent immigrants whose partially ruined stone city is under constant siege by expanding thorn-bushes. Prince Nickel shows how hopeless their rampart defense is and his alternative, a flying stone arch. His mother, dumb matriarch Jade, however obstinately insists to wait for the return of his doted brother, city-founding architect Mica, whom the serpent inspires to seek the legendary rock seed. When the people insist it's tome to use the arch, the serpent convinces Jade to sabotage it.
—KGF Vissers