Investigating the disappeance of a correspondent of James West's, the agents come upon a bizarre family scheme. West's associate had a rare disorder that caused rapid aging, similar to that of the Sedgewick family. In an attempt to cure the disorder, the family physician has been kidnapping people with the similar disorder and using them to test a serum he has prepared. It is up to West and Gordon to stop his tests and bring him to justice.

Agent Artemus Gordon and the curator of the San Francisco Museum are set upon in the Egyptian exhibit by three men wearing gas masks. When agents West and Mr. Heisel, the Egyptian government's representative, enter the room, they are also attacked. After regaining consciousness, the men discover that a priceless ruby has been stolen from the eye of the statue of Sun God, Ra. Commissioned by Miasmin, an Egyptian Princess, to recover the gem, West and Gordon trace a ransom note to a waterfront bar where Gordon poses as a sea captain. At the bar, West recognizes one of his assailants at the museum. The man identifies himself as Jason and indicates that Rosie, a beaufiful young dancer at the bar, is wearing the ruby on her toe. Unfortunately, Rosie vanishes before West can make a move.