A more mysterious and less laughable case than Miss Pym Disposes (1948) for Robert Blair, a dignified solicitor, finds himself saddled with two unusual clients, Marion Sharpe and her mother. They are supposed to have kidnapped and beaten a teen age school girl so Blair's job is to prove the girl was somewhere else. Dogged deduction, starting from scratch, and Blair pulling it off. Dignified, disappointing, very British.