Film legend Joan Crawford gives a terrific performance in this chiller from pioneer horror movie producer William Castle. Crawford plays Lucy Harbin, a woman who goes berserk when she finds her husband in bed with another woman. With her three-year-old daughter accidentally witnessing the grisly act, Lucy axes the couple to death. She spends twenty years in a mental institution for the double murder. After she is released, she moves in with her brother (Leif Erickson), his wife and her own daughter (Diane Baker), now twenty-three. Her nightmare is over ... or is it? When a spate of ax murders start occurring suddenly in the neighborhood, police think Lucy has reverted to her old ways. The truth is finally revealed in a rousing, blood-chilling finale.