Castle Araluen is well protected against attackers – but what if the enemy is already inside? King Duncan and Princess Cassandra are trapped high in the south tower of Castle Araluen. In the north, Sir Horace and Ranger Commandant Gilan are besieged in an old hill fort, as they wait for the Red Fox Clan's next attack. Ranger's apprentice Maddie must find the Heron brotherband and convince them to join her, so she can give her father the help he needs to break out from the hill fort and ride to confront the traitor. Will they reach Castle Araluen in time? And when the battles have been fought and the dust has settled, who will rule the Kingdom of Araluen?