Keith and Sherri Papini's seemingly idyllic family life is shattered when Sherri vanishes from their northern California neighborhood, triggering a frenzied search that becomes news around theworld. With unprecedented access to Sherri's family and friends - as well as the investigators who struggled for six years to solve the mystery of her disappearance - this limited documentary series intimately explores the jaw-dropping revelations of a relationship that wasn't what it seemed.