Crest da Zoltral and his companions narrowly escape Tramp only to find themselves clinging to life on a severely damaged ship. When an Arkonide vessel comes to their rescue and takes them to Larsaf III, suspicions surrounding the rescued time travelers increase and they soon find themselves imprisoned as the Methanes attack. Will they survive the historical fall of Atlantis? Or will their journey meet an early end thousands of years before their present?

Meanwhile, Rhodan's group arrives by stowing away on an alien ship. Their reception is all the more hostile, as they are forced to flee into the forest to avoid robots hunting them down. Driven by a vision Rhodan once had, they strive to find a path from the hemispherical planet's round side to its strange and implausible flat side.

As secrets abound and IT's servants play a game of wits with competing agendas, what truths will be revealed about the Planet of Eternal Life, and will the heroes finally be granted the immortality they seek?