In suburban California, an intruder attacks and kills 55-year-old Joan Dawley; as the Dawley family grieves, it falls to LAPD Detective Paul Tippin to crack the case; home movies reveal a shocking tale of deceit.

In Ogden, Utah, Stephen and Becky Vargas appear to have it all; however, jealousy and control issues abound behind the picture-perfect life seen in their home videos, but no one suspects their marriage will end in murder.