Centers on the strained relationship between young mother Morgan Grant and her teenage daughter Clara, exacerbated by Morgan's husband Chris's tragic death, forcing them to navigate life's challenges together.

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...