A frightened Hay Lin is desperate to protect her grandmother from Nerissa. But Nerissa’s pursuit to capture Yan Lin results in a relentless chase from one dimension to another.

There's a new girl in town, Will. The other four girls invite her to have an after-school snack at Hay Lin's house, where Hay Lin's grandma tells them about their powers. Meanwhile, Caleb is on the run. The girls must use their powers to save Caleb and the rest of the Earth from the evil Prince Phobos; a horrible tyrant who rules Meridian, and his minions.

It's Will's birthday party and if there's one thing she doesn't want, it's a party. The girls manage to throw one anyway and everything is going swimmingly until one of those Meridian fang-faces shows at City Hall looking for birth certificates for a certain teenage girl. Apparently, the current Prince of Meridian has a long lost sister...

After Blunk finds the Horn of Hypnos, Irma is forced to team with the garbage-obsessed Passling to save the day.

While Blunk and Caleb search for the Knights of Vengeance, Nerissa and Sandpit make life miserable for the Guardians on their summer vacation by using the power of illusion to turn W.I.T.C.H. against each other.

Irma is put in charge of Sheffield’s new student radio station K-SHIP, and winds up calling Martin a loser on the air, endangering their friendship.

W.I.T.C.H. folds to another dimension to protect the world of Zamballa from Nerissa, but the sorceress and her Knights of Destruction are already using glamours to frame the Guardians for the destruction of the purple planet.

After Cornelia discovers a startling reveal about Lilian, the Hale sisters must learn to stand undivided against danger.

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.

Nerissa sends dangerous Annihilators to lay waste to Meridian while Matt asks Caleb to train him as a warrior.

W.I.T.C.H. is busy with the K-SHIP broadcast of Vance Michael Justin in concert. Irma is in charge and demanding total obedience from her minions.

Yan Lin hides on Zamballa, but the Knights of Destruction attack and Kadma convinces Will that they should turn the tables and make Nerissa their quarry.

While Meridian threatens to be turned into a hellish nightmare, Hay Lin struggles against artist’s block when trying to find her own paradisiacal vision of Xanadu.

Every student in Sheffield Institute is getting his midterms back and everybody is just about happy with his grades, except Taranee. Cedric's disguise as a bookseller seems to have attracted Cornelia, Elyon, Irma, Taranee, and Hay Lin to the store to look for history books (and to ogle at Cedric). While in the bookstore, the W.I.T.C.H. girls inadvertently touch an inversion point and find themselves in the middle of a Labyrinth inside Phobos’ castle. Will they be able to find their way back without powers and without help from their leader Will who is at home buried in school work?

Tired of having their supply lines constantly ambushed by the rebels, Phobos and Cedric start a rumor that the Seal of Phobos has been found in order to flush out the spy. The seal of Phobos is an artifact much like the Heart of Candracar in that it can open up places like the Infinite City or The Veil. Caleb, who is stuck on Earth after trying to use a portal without telling the Guardians where it is, hears the false rumor and falls for it, eventually getting captured by a living quicksand pit at Torus Filney. Meanwhile, the girls are faced with the prospect of having to perform a play based on a myth of their choice thanks to Hay Lin's non-consentual group sign-up. The girls choose the origin story of the Heart and subsequently their powers but before the curtain can go up, Grandma tells them about Caleb's disappearance and capture. Stuck for a plan of action, the girls are enlightened to another of the Heart's powers: the ability to clone the Guardians. While the clones put on a miserable and detention-provoking performance, the girls save Caleb and everyone else who has been captured by the quicksand monster and make sure no one falls victim to it again. The good news is that Phobos really doesn't have the seal. The bad news is the Seal is lying in a storm drain in Meridian, waiting for some poor schmuck to find. As the episode closes, Cedric demands a list of all who left the castle yesterday.

Phobos has finally found an indisputable way to find his long-lost sister: The Star of Threbe. Back in our world, The Silver Dragon (Hay-Lin's family business) is threatened when Blunk stinks up the joint with his new ""home"": a garbage dumpster. While the girls try to give Blunk a much needed bath, Cedric places the Star in his window shop and Cornelia's platinum-haired friend walks in and takes it. Now when the girls try to change back, they find themselves stuck in Guardian form and powerless. Not knowing what to do, the girls race back to the Silver Dragon to enlist Mrs. Lin's and Caleb's assistance. In the meantime, Cedric sends a monster plant to Earth to tie up the Guardians while he makes contact with the Princess. The girls are forced to fight without their powers until the Princess returns the Star to Cedric, which leads the girls back to their powers. Unfortunately, Phobos and Cedric have who they're looking for, she just doesn't know it yet.

With Phobos defeated, everyone thinks the danger has passed, including Taranee, who is afraid that she will once again become an anonymous wallflower.

While the Guardians are going through some changes, Nerissa sends Miranda and Sandpit to Heatherfield to make W.I.T.C.H. miserable.

Caleb finally attempts to win Cornelia back, but his efforts are complicated by her secret relationship with Peter Cook and the facade she’s maintaining that she is really her own older sister, “Lilian.”

The teardrop-shaped jewel from Weira’s crown causes Elyon to seek information on her birth parents while the Guardians are scattered on their family vacations.

W.I.T.C.H. gains new knowledge of their sorceress foe Nerissa, a former Guardian and one-time holder of the Heart of Kandrakhar.

Shagon torments W.I.T.C.H.’s friends and family, leading to a hatred-filled showdown that tests Will’s ability to show mercy.

While Caleb and Cornelia are still at odds over his decision to stay on Meridian, the Knights of Vengeance seek revenge against the betrayal of those who backstabbed their former master Phobos to join the rebellion.

Cornelia’s narcissistic behavior is getting on the other four Guardians’ nerves, especially when she signs them up to help her out at a school carwash so she won’t have to do any actual work.

Hay Lin is thrilled with her new braces, but when a beautiful transfer student named Stacey arrives at Sheffield, her confidence fails her and there is trauma in store.