Fighting for the King

Waldemar is the child king of the Kingdom of Proster. Duke Weldon and Duchess Rana help him make good decisions for his kingdom. So when a demon appears to be after Waldemar, Weldon and Rana, with the help of his mother, do what they can to keep Waldemar safe.
When a group is children kidnapped, the whole castle is in an uproar. The demon has kidnapped them all because that is his food source.
Can Waldemar help his friends? Is there a way out of this? Who is this strange white wolf who is trying to help him?