Tirsa Auret is being forced to kill Professor Russell Robinson. Robinson is heading an expedition to New Guinea in search of an ancient book that was allegedly written at the time of Jesus, by Jesus. The book, if found, could literally change history.
Tirsa has faked her way onto the research vessel. Her plan was to kill the professor then get off the ship before it sailed. However, she is caught and is forced to travel to New Guinea under guard.