June 1922. The disappearance of a British expert on radio waves has left the British Government in India baffled. Strange craft move silently through Bombay Harbour by night. Sinister men in blood-red turbans seem determined that McCracken will never learn the truth.

Arriving in India to keep a promise, McCracken and his companions soon discover that every clue leads to a deeper mystery. An ancient map draws them ever closer to the Lost Fortress, but also forces them to face choices that test their courage and their deepest allegiances.

Traveling by submarine, airship, train and elephant, and aided by a courageous young Indian princess and her faithful servant, McCracken follows a trail that stretches from the bustling streets of Bombay to the forgotten forests of Bundelkhand. There, he uncovers a conspiracy rooted in the ancient past—one with the power to reshape the world. . .