In Tokyo on the eve of the Pacific War, junior naval officer Ushioda and the sharp-minded Major Tokai of a special Imperial Navy intelligence unit take on a counterespionage mission. Suspecting that secrets of the Pearl Harbor attack have leaked, they engage in a battle of wits with American, British, and Soviet agents.

A spy suspense novel in which a special naval unit and foreign intelligence agents clash in Tokyo on the eve of the Pacific War.