At the end of "Doom of Stars" it was revealed that plans were underway to save humanity from extinction by founding a colony around Alpha Centauri.

5 great lightsail starships were launched from Venus-orbit on  journeys that would take over 200 years.

This is the story of the Magellan and how generations came and went as the travellers gradually forgot about Earth while facing many trials on their epic journey.

But the greatest was yet to come - one which would imperil the entire Milky Way galaxy.