The Guardians are stunned to learn that their math teacher Mrs. Rudolph is the Meridianite nanny who brought Elyon to Earth twelve years ago. She opened a portal with the niêm phong, con dấu Of Phobos. but Mất tích it during the escape.
Phobos sends shapeshifting monsters into Meridian to pose as and discredit the Guardians so Elyon will lose what little trust she has left in her friends.
When Caleb discovers that Blunk took the key he was suppose to leave behind in Meridian for Vathek, the girls return to Meridian to return the key before Cedric and Phobos discover Vathek is a spy for the rebel army.
