There's no doubt that Lynne (Jean Peters) is beautiful, but could she also be deadly? This is the question her devoted brother-in-law Whitney (Joseph Cotten) must ask himself when first Lynne's husband (Whitney's brother) then her stepdaughter die mysteriously. Torn between love and suspicion, Whitney must act quickly to prevent more killings in this noir chiller from Andrew L. Stone co-starring Gary Merrill and Catherine McLeod.