It's 2220 on exoplanet Zingu. What is left of humanity faces peril again after escaping from a dying Earth. The new colony, Arcana, is split in two. The former Tellurians (the Nats) live in ArcaNat while the cyborgs and robots are housed in ArcanArt, among the production units. And now the rift between these two parts of the colony is growing. The Nats need to act fast as the threat of a machine take-over which would seal humanity's fate comes to light. Fortunately, before their departure from Earth some 140 years ago, scientists had foreseen the possibility of such a situation and drawn up a solution. The only hang-up is that the key to the problem is hidden on planet Earth in a Spanish monastery, in the long-lost past. Will the Nats manage to overcome all the obstacles, defeat the machines and ensure our species' survival ?