The inhabitants of Serendipity have survived the dramatic events that followed the arrival of humankind’s second starship, the Inspiration. David Miller’s beloved Grace lies suspended between life and death, and he faces the prospect of leading a divided community. Meanwhile, disaster looms in the form of a planet-busting asteroid that will strike their planet in a matter of months.

Somehow David must unite the colony in a desperate attempt to avert the coming disaster – and perhaps the extinction of humanity.