From the synopsis sent to the exhibitors: When Martin Morgan (Francis Ford)steals the Jade Box which his friend John Lamar (Monroe Salisbury) has purchased in the Orient, Lamar is spirited away by the members of an Eastern Cult. When they learn that the box has been stolen by Morgan, the cultists vow to get him. Meanwhile, Jack Lamar (Jack Perrin), son of the vanished John, becomes engaged to Morgan's daughter Helen (Louise Lorraine.) When Morgan is talking to Jack and Helen, a mysterious shadow appears and leaves a message that Jack's father is in the Land of the Shadow, and won't return until the Jade Box is returned to the sect.
The box contains a vial that holds the secret to invisibility, and Jack sets out on a search that ranges from the United States to the Middle East. But Morgan, his sweetheart's papa, stands in his way, as Morgan is determined to find out the secret of invisibility and use it for his own selfish needs.
