DiGriz and Angelina are happily married and expecting the birth of their sons. The planet Cliaand is waging interstellar war, and against the odds, its Grey Men are invading and taking over planet after planet. The Rat is sent to Cliaand to start a one-man guerrilla campaign to put a stop to the plans of the planet's leader, Kraj. He is aided by the Amazons, a force of liberated freedom fighters, and eventually by his wife who arrives to help him win the war and keep him out of the arms of the Amazons.