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.

As an ancient threat endangers both Vikings and dragons alike on the isle of Berk, the friendship between Hiccup, an inventive Viking, and Toothless, a Night Fury dragon, becomes the key to both species forging a new future together.

After being abducted by a child killer and locked in a soundproof basement, a 13-year-old boy starts receiving calls on a disconnected phone from the killer’s previous victims.