Judy, who is bright but a little strange, and Howard, a befuddled Iowa musicologist, meet in a San Francisco hotel. The only thing they have in common is their red plaid travelling cases (his holds rocks; hers, lingerie). Identical cases are owned by two of the hotel's other guests. Mrs. Van Hoskins keeps hers stuffed with jewelry, and Mr. Smith's holds a batch of top secret government documents. When the bags are mixed up, the result is chaos of...