Lujan Serege is the Chief Commander of the Unified Worlds' special contingency force, and a man with many enemies. Young Tristan, his son, and Darcie, his wife, have been rescued after years of being marooned on a wild planet, then held in captivity by enemies of Lujan. But now the family is separated again, when Tristan is called to return to action on the terrible moon where he was formerly a captive. The war is not over yet.