W.I.T.C.H. plot
The Guardians must save Meridian from Phobos and Cedric, who are looking for Phobos' sister, the long-lost princess of Meridian and the true heir to the throne. After Meridian is freed and the true heir ascends the throne, a new sorceress named Nerissa frees Phobos' minions and transforms them into the Knights of Vengeance. After the Guardians learn of Nerissa's evil plan, they defeat the Knights, only to be attacked by even stronger Knights and former Guardians.