After the collapse of life on Earth as it once was known, 600 people are selected for passage on Shipworld, a spacecraft charting a 360-year voyage to a new planet. Their mission will see generation after generation born, living and dying on board – until one day their descendants finally step foot on the ‘Super Earth’ that might offer the last chance for humankind’s survival. But life aboard Shipworld is far from a waiting game. The spacecraft promises a world of its own, a harmonious system free of class distinctions and wealth accumulation. Yet with each new generation comes daunting challenges to the future of their civilisation – from creeping doubts about the nature of reality to an outbreak of disease that could eradicate their population, from rebels who threaten the unity of the mission to a traumatic encounter with a mysterious space phenomenon.