Race car driver John Bentley marries heiress Rona Anderson. After a year, she confesses to her lawyer, Donald Houston, that he married her only for her money. He's been keeping a girl on the side. Houston discusses divorce with her. She goes home, tells Bentley she's leaving. Bentley then plans her murder... but first he kills Houston, telling him his perfect plan as he collapses under poisoned whisky. Houston gasps out that there's a flaw, and dies.
It's a B picture, basically a three-actor affair, and the lack of adornment means it is eked out by a rather slow editing pace and some long sequences of getting from point A to point B. However, it's a clever little story by Brandon Fleming, the actors are excellent, and Terence Fisher's direction is good. Without any cinematic gloss, it fills an hour very pleasantly.