After his father's death, Roland Stone learns that his will stipulates that he must go to the South American country of Bunkonia and sell life insurance.

A man comes by a map that shows the location of a secret treasure, but runs afoul of a criminal organization known as the "13". Chapter ten, eleven and twelve are still missing from this 15 episode serial.

While visiting Egypt, Mrs. Graham steals a famous jewel called "The Eye of the World" from a mummy's sarcophagus and returns to the United States, planning to use the gem as collateral for a loan. Kah, the priestess in charge of protecting the tombs of Egyptian nobility, is soon on her trail , determined to retrieve the gem. Mrs. Graham's lovely daughter, Betty, agrees to marry a suitor for money to prop up her father's failing business. When the bridegroom is murdered on the couple's wedding night, and the body disappears, Phil Kelly decides to lend a hand in solving the crimes.

In the mythical kingdom of Lyria, two young Americans get mixed up in a plot to get rid of the rightful king, who at times loses his reason.