When Mary Scott, 23, is found murdered in her San Diego home in 1969, a case with few leads quickly loses steam. Years later, Mary's daughters grow determined to find answers about the mother they barely knew, and a crime that's 50 years cold.

When 31-year-old Linda Slaten is brutally strangled in her Lakeland, FL home in 1981, a complex web of suspects emerges. The case takes a dramatic turn when a DNA hit expose the sinister underbelly of a seemingly peaceful community.