Gremword

In a vast and ancient world, in the Forest of Demons, the Demon Lord Gremword has come up with a malicious plot to attack the island base of his enemies, the Fesittes.
Specifically, the island where their children grow up. James, the son of the Fesittes' commander, doesn't want the training base to be destroyed. He sets off on a quest with his friends, across perilous forests, towering mountains and cliffs.
Their aim is to foil Gremword's plan and also to defeat the vicious Lord himself, without being found and killed. Will he make it, or will the island base be destroyed forever, and the Fesittes' children all hunted down?