AllMovie

Mr. Denning (John Mills) is bedeviled by a blackmailer with whom his daughter Liz (Eileen Moore) has fallen in love. In a sudden fit of rage, Denning murders the scoundrel. Panicking, he drives northward with the corpse in the back seat, dumps the body in a lonely rural area, and carefully eliminates all traces of his involvement in the crime. To deflect the authorities, Denning places a highly distinctive ring on the body's finger, so that the dead man will be misidentified. A perfect crime? Well, it seems that Denning's new prospective son-in-law (Sam Wanamaker) is an American attorney with a very inquiring mind.