With the two castaway groups on Lincoln united, the struggle for survival against a hostile planet continues. Meanwhile, on the nearest colony, stragglers from the initial accident have shown up. This leads an accident investigator to a remarkable discovery. A previously hidden star system, and a faint hope that the castaways might have survived.
The final book in this second Boundary trilogy brings the story to a satisfying conclusion, but the corniness of the dialogue and interaction remain. Everyone is still almost comically rational and humble.