Gwen, Pete, and the others have escaped from Everland. But the safe haven they hoped to find at Alnwick Castle doesn't exist. With the Queen of England on her deathbed, Duchess Alyssa has stepped in to lead, but things have gotten worse as the cure Doc created for the Horologia virus has mutated, accelerating the disease. The only possible solution he can think of is to go back to the virus's origin: an extinct poisonous apple.