Mysterious India is the scene of Biff Brewster's latest adventure. With Kamuka and Likake, his companions of the exciting days in Brazil and Hawaii, Biff is traveling by freighter to meet his father. But a puzzling message directs the boys instead to the teeming New India Bazaar in Calcutta. There Biff sees for the first time the Indian boy Chandra, who later saves Biff's life by means of a desperate, clever trick.

       In The shadowy warehouse of D. Chand & Bros., Biff is entrusted with the fabulous blood-red ruby, the Light of the Lama. Accompanied by Kamuka and Chandra, Biff sets out along the Grand Trunk Road to return the ruby to its rightful owner, the Chonsi Lama, ruler of the lost city of Chonsi.

       Ambushed in a ruined temple by converging bands of murderous thugs, attacked by a man-eating tiger, and menaced by the Yeti––the "Abominable Snowman", the boys overcome almost insurmountable odds to accomplish their mission. When at last they come into the presence of the Chonsi Lama, an unpredictable and terrifying enemy almost costs them their lives.

       Young readers will be unable to put down this swift-paced, spine-tingling story of mystery and intrigue in modern India.