A couple's six-year-old daughter befriends a strange young girl and the pair vanishes into thin air. And then she was lost . . .

Allison and James Price move to the navy-blue forests of Concordia Idaho hoping to leave behind the chaos of Los Angeles and the painful memories of his indiscretions. Once settled in the picturesque town, where time seems to have stalled and life moves at a slower pace, their six-year-old daughter, Reagan, befriends a mysterious young girl who seems too idyllic to be true with her pressed pinafores and perfectly curled pigtails. One late autumn evening, as their playdate winds down, both girls vanish into thin air. The little girl said she lived at the end of the street but the only thing Allison and James find at the end of the cul-de-sac is the gaping mouth of the forest. Their little girl, the mysterious playmate—they're both gone.

Everyone is looking for Reagan. Nobody has come forward to claim the mysterious little girl. Both Allison and James look guilty as hell. Maybe they are.