As the war with the dragons intensifies, all eyes are turning to Titan Valley for help. A dragon sanctuary unlike any of the others, this one is home to enslaved dragons ruled by the powerful Giant Queen, one of the five monarchs of the magical world. In addition, it houses the arena for the Titan Games, a series of gladiator-style battles presided over by none other than Humbuggle, the demon who stole Seth's memories! Seth is seeking for his memories....

Cursed by the Key of Forgetting, Seth has lost all memory of his past, and aligns with his new mentor, Ronodin. The dark unicorn takes him to the Phantom Isle, the secret gateway to the Under Realm. Though Seth is not formally a prisoner, Ronodin wants to use him and his shadow charmer powers for his own dark ends. Kendra's search for her brother will take her and Warren, Tanu, and Vanessa to Crescent Lagoon, a recently fallen dragon sanctuary. If...