J is for Jewel

The Guardians are divided, each of them on family vacations, but Hay Lin is the only one left at Heatherfield. The Knights of Vengeance attack Phobos's prison and manage to free their prince, and it is up to the Air Guardian to gather the girls so they can fight back. Meanwhile, Elyon wishes to know about her parents, and after giving her lies about them, Trill reveals herself to be Nerissa, and traps Elyon inside the jewel from Queen Weira's crown she'd given her earlier, stealing her powers and kidnapping Elyon. In the subplot, Hay Lin meets and falls head-over-heels for a boy named Eric.