The ring of five

Danny Caulfield's plans for a quiet Christmas break from Wilsons Academy, the school for spies, are shattered by gunshots and a heartrending discovery about his parents, and he has no choice but to return to Wilsons to prepare for an undercover mission to protect the Treaty Stone, which maintains the peace between the Upper and Lower Worlds.

Danny Caulfield's quiet Christmas break from Wilsons Academy, the school for spies, is shattered by gunshots and a heartrending discovery about his parents, and he is called back to Wilsons to prepare to go undercover to protect the Treaty Stone that keeps peace between the Upper and Lower Worlds.