Young, wide-eyed Kathie falls in love with charming but quirky real-estate scion Robert Durst, only to find their marriage turning stranger, darker, and more disturbing as time passes.

Young, wide-eyed Kathie (McPhee) falls in love with charming yet quirky real-estate scion Robert Durst (Gillies), only to find their marriage turning stranger, darker, and more disturbing as time passes. When Kathie vanishes in 1982, her family and friends are deeply disturbed that the police are not taking her disappearance seriously.