Simon meets a gorgeous girl on a plane - and flies into drama stemming from the death of a girl's brother, and into a flashback to wartime resistance heroism.
Paris provides the setting for Simon's meeting with a lovely woman whose brother is later suspected of murdering an undercover agent.
Simon becomes interested in an oriental diplomat's pearl necklace.
Shortly after meeting the Saint in a Paris nightclub and informing him that he is being followed, Brian Quell is kidnapped by a gang led by a man called Jones in an attempt to lure Brian's brother, a professor, to work for foreign agents.
Steed joins the Hellfire Club, Emma becomes the queen of sin.