Love, treachery and sacrifice come to Japan in the first part of the 20th century. John Mung and the Black Dragon Society are called upon by the Emperor to thwart Japan's militarist plans to wage war with China, Korea, and Russia. When Mung's grandson and his wife are recruited to spy in Manchuria, they are caught in the schemes of Colonel Shibata.

This fourth novel of the Power Path Series shows the growth of Japan's international spy system that outmaneuvered the western military world in the first part of the 20th century, and reached the epitome of industrial espionage in the latter half of the 20th century.