After their adventures in ‘The Reign Of The Winter King’, Tilly, Sam, Henry and Arthur have continued their training, ready to take their places as the new Summer Court. But they may be called on to do this sooner than they think.

Arthur’s right to the Summer Throne is called into question and he must prove he is worthy to lead the Court. But the forces of evil are gathering once again and this time Morten and Anna have a mysterious new ally.

Can Arthur keep everyone safe, complete his quest and work out who is the power behind Morten and Anna?