William is about to start school, and that means saying goodbye to his best friend at kindergarten. He is very sad and decides to run off to the wonderful and mystical Night Forest with his plush bear Tjugga. Never to return and never to start school. Here, William meets the fox Sally whose pet caterpillar goes missing, and it turns out it’s been taken by a dragon! Despite his fear, William decides to go on an adventure through a forest, a sea, an island, and a mountain to reach the dragon’s cave and save Sally’s friend.