Q:Build a movie plot around this: Who does Robie enlist the help of? H.H Hughson
A:
John Robie (Cary Grant) is a retired infamous jewel thief or "cat burglar", nicknamed "The Cat", who now lives in a hilltop villa in the French Riviera growing grapes and flowers. The modus operandi of a recent series of robberies leads the police to believe that Robie is active again; they attempt to arrest him, but he gives them the slip.Robie visits a restaurant. The staff are his old gang from his French Resistance days, paroled based on patriotic war work as long as they keep clean. Bertani, Foussard, and the others blame Robie, because they are currently all under suspicion while the new Cat is active. Still, when the police arrive at Bertani's restaurant, Foussard's teenage daughter Danielle (Brigitte Auber), who has a crush on Robie, spirits him to safety.Robie can prove his innocence if he can catch the new Cat in the act. He enlists the aid of an insurance man, H. H. Hughson (John Williams), who reluctantly obtains a list of the most expensive jewelry owners currently on the Riviera. Widow Jessie Stevens (Jessie Royce Landis) and her daughter Frances (Grace Kelly) top the list. Robie strikes up a friendship with them. Jessie's delighted but Frances offers a pretense of modesty. When Robie and Frances run into Danielle at the beach, Robie keeps up the mask of being a wealthy American tourist, despite Danielle's jealous barbs about his interest in Frances.From the trailerGrace Kelly and Cary GrantGrace Kelly as Frances StevensKelly and GrantFrances sees through Robie's cover as an American industrialist. She seduces him, dangling before him her jewels, teases him with steamy tales of rooftop escapades, and offers herself as an accomplice who might share his crimes. Fireworks fill the night sky.The next morning, Jessie discovers her jewels are gone. Robie is accused by Frances of being merely a distraction so he could steal her mother's jewelry. The police are called, but Robie has disappeared.To catch the new Cat, Robie stakes out an estate at night. He struggles with an...