Fleeing the supernova chain reaction at the galactic core, the cowardly Puppeteers of the Fleet of Worlds have---just barely---survived. They've stumbled from one crisis to the next: The rebellion of their human slaves. The relentless questing of the species of Known Space. The spectacular rise of the starfish-like Gw'oth. The onslaught of the genocidal Pak.

Catastrophe looms again as past crises return---and converge. Who can possibly save the Fleet of Worlds from its greatest peril yet?

Louis Wu? Trapped in the Wunderland civil war, all he wants is to go home---but...