Perry Rhodan has discovered a huge space ship, an ark in space, carrying a population of humans who set out on their journey 55,000 years ago, from Earth - Lemurians, the legendary forefathers of mankind.

In order to find all the arks, Perry Rhodan embarks onto a mission to the home system of the Akons. There, in the stronghold of the enemy, he hopes to find the coveted data, stored in the central computer of an ark recently captured by the Akons. A startling discovery awaits him: Levian Parron, the creator of the arks, is still alive!