Build a movie plot around this: whose key does not work? Margot's bag
Answer:
Tony Wendice (Ray Milland) is a former tennis player who married Margot (Grace Kelly) partly for her money. To please his wife, he has given up tennis and now sells sports equipment. Margot once had a relationship with Mark Halliday (Robert Cummings), an American crime scriptwriter, but broke it off when he went back to the U.S. for a year.In time they stopped writing to each other, and when Mark returns to London she tells him that she burned all his letters but one. Margo explains to Mark that the letter was stolen by a blackmailer who demanded 50, so Margot payed by mailing the money to a pawn shop location as intended, but the money was never picked up and the letter was never returned. Mark tells Margo that he wants to tell Tony about them so she can divorce Tony so she and Mark can be together, but Margot refuses out of fear of hurting Tony's feelings.It is also revealed that Tony and Margot have made their wills, naming each other as beneficiary with assets and money totaling 90,000. For a year, Tony meticulously plans Margot's murder. She has no idea that Tony knows of her love for Mark. He has gone to great lengths to steal a handbag containing one of Mark's letters, and even assumed the role of the anonymous Brixton-based blackmailer to find out whether she would pay to have it back. (She did, but he asked for only 50 and she did not, of course, get the letter back.) He even watched them having a little farewell party, eating spaghetti with mushrooms in Mark's studio flat in Chelsea.Tony slyly withdraws small amounts of money for a year, collecting 1,000 in (used) one-pound (1) notes, with which he plans to pay a contract killer. He singles out the perfect man to do the job: Charles Alexander "C.A." Swann (Anthony Dawson), who now calls himself "Captain Lesgate", a former acquaintance who has embarked on a life of petty crime since even before leaving Cambridge where he and Tony were both students. By following him and finding out about his past and associations, Tony soon gets enough to...