Its outline may remind you of "sudden fear" starring Joan Crawford,Jack Palance and Gloria Grahame : the victim knows her husband and his mistress are going to kill her for she eavesdropped on their conversation which revealed their ominous plans.Besides ,a tape recorder plays a prominent part in the plot.But it's a good murder mystery on its own :the screenplay (based on a play) is well constructed ,and even the manslaughter on the road has its raison d'être(the final picture packs a real wallop) .Even the title is well chosen .
The sisters ' feud is a little derivative: it's once again the "my kid sister was spoilt , they had only eyes for her " well-known tale ;but the film is short , tense ,and there's never a dull moment .Directing is not very inventive ,but the
suspenseful script will keep you glued to your seat till the very end.