Vikings and dragons have been enemies since time began. But for the past 10 years since Hiccup tamed Toothless, the tribe of Berk has lived in harmony with the intelligent beasts. However, their forgotten neighbours, the Vikrins of Yorin, actively hunt and overpower dragons, using them as tools for war and wizardry, and they're quickly becoming a danger to the Berkians, aided by an old foe, the self-proclaimed 'dragon god' Drago Bludvist.
This is Berk, where the upsides are the pets: their dragons will protect them against the armies and armadas that seek to overcome them. This is Yorin, where dragons' powers are taken through violence and death and the newest villain on the scene is trying to gain the upper hand. Wherever your character may reside, dragons are an indispensable aspect of their culture. What's certain is that you need dragons to fight dragons, and the way of peace is clashing with the way of domination and control.