A race of microscopic beings, who were genetically engineered to survive on the turbulent mantle of a neutron star and who vividly remember their superbeing creators, prepare for the biggest family reunion in history. Dura's world is the Mantle of the Star - an immense cavern of yellow-white superfluid air bounded below by the deadly purple Quantum Sea and above by the Crust, a matted ceiling streaked with grass and trees. For ten generations Dura's tribe of humans has lived here, but things change.