Witness for the Prosecution

Senior barrister Sir Wilfrid Robarts, who is recovering from a heart attack, agrees to defend Leonard Vole despite the objections of his private nurse Miss Plimsoll, as Sir Wilfrid's doctor has warned him against taking any criminal cases. Vole is accused of murdering Emily French, a wealthy, childless, older widow who had become enamored of him and had named him as the main beneficiary in her will. Strong circumstantial evidence points to Vole as the killer, but Sir Wilfrid believes Vole to be innocent.