When Hiccup thought it was all over, Night Furies start to attack Berk in revenge for what he and Toothless had both done to them. It is up to Hiccup and Toothless once more to save Berk before it is too late. Before all of Berk is destroyed. A strange ally is found, and Hiccup realizes that with her help, they could solve everything. But the thought might just come too late.