As Finn, now 17, struggles with life after his captivity, his sister begins receiving calls in her dreams from the black phone and seeing disturbing visions of three boys being stalked at a winter camp known as Alpine Lake.

Finney Shaw is a shy but clever 13-year-old boy who is abducted by a sadistic killer and trapped in a soundproof basement where screaming is of no use. When a disconnected phone on the wall begins to ring, Finney...