Lieutenant Commander Matthew Reddy, along with the men and women of the USS Walker, have chosen sides in a war not of their making. They have allied with the Lemurians - a mammalian race whose peaceful existence is under attack from the warlike, reptilian Grik. The Lemurians are vastly outnumbered and ignorant of warfare, and even the guns and technology of Walker cannot turn the tide of battle.

Pressed into service when World War II breaks out in the Pacific, the USS Walker---a Great-War vintage "four-stacker" destroyer---finds itself in full retreat from pursuit by Japanese battleships. Its captain, Lieutenant Commander Matthew Patrick Reddy, knows that he and his crew are in dire straits. In desperation, he heads Walker into a squall, hoping it will give them cover---and emerges somewhere else.

After the battle in which the men of the destroyer Walker and their Lemurian allies repelled the savage Grik, Lieutenant Commander Matthew Reddy is shocked by the arrival of a strange ship captained by one Commaner Jenks of the New Britain Imperial Navy - an island-nation populated by the descendants of British East Indiamen swept through the rift centuries before.

Stuck in an alternate universe during World War II, Lieutenant Commander Matthew Reddy of the U.S.S. Walker has found an unlikely but invaluable ally in Commodore Jenks of the New Britain Imperial Navy. And now they are united in their desire to hunt down the traitor who abducted two women both men would die to protect: Reddy's love, nurse Sandra Tucker, and young Princess Rebecca of the New British Empire. But first they have a new battle to win. However, this battle will not be fought with broadsides and broadswords, but with cunning and intrigue.

Lieutenant Commander Matthew Reddy and the crew of the USS Walker find themselves caught between the nation they swore to defend and the allies they promised to protect. For even as the Allies and the Empire of New Britain Isles stand united against the attacks of both the savage Grik and the tenacious Japanese, the "Holy Dominion" - a warped mixture of human cultures whose lust for power overshadows even the Grik - is threatening to destroy them both with a devastating weapon neither can withstand.