Valhalla and Britannia

On the Isle of Kings stand two opposite kingdoms. King Freddie reigns over Valhalla, the Sunny Kingdom, and spreads peace on his territory. Unfortunately, King David, king of Britannia, wants to conquer Valhalla to achieve his maleficent goals. Valhalla is in terrible troubles, but can maybe be saved by four immigrants from Britannia, coming in peace. Will they be able to avoid a war? Will the two kingdoms live in peace?