John goes in search of Philippa, who is being held at the Blue Djinn's secret palace in Babylon. The twin's favorite uncle, Nimrod, also goes in search of an acceptable alternative to Philippa as the next Blue Djinn.
John sets off to rescue Philippa from the Blue Djinn's hidden palace in Babylon.  His twin's uncle, Nimrod, is also searching for someone suitable to take over as the next Blue Djinn if Philippa cannot be found or accepted.