For a long time, two distinct worlds have existed: Earth, known to humans, and Metamoor, home to spirits and fantastic creatures. Because of Metamoor's power-hungry ruler, Prince Phobos, a veil was created between the two planets to stop him from infiltrating Earth. A council of powerful spirits from Kandrakar, a realm situated between the two worlds, watches over them. However, the veil has started to weaken, forcing the council to depend on the arrival of the legendary Guardians of Kandrakar. Meanwhile, on Earth, 14-year-old Wilhelmina "Will" Vandom has recently moved to the city of Heatherfield. After strange occurrences began upon her arrival and continued through her new school's Halloween party, Will soon discovers that she has been chosen as the leader of the new Guardians of Kandrakar and is given a mystical crystal, the Heart of Kandrakar. Her fellow Guardians happen to be her schoolmates at Sheffield Institute, each possessing a natural affinity with the elements of water, fire, earth, and wind. These are Irma Lair, Taranee Cook, Cornelia Hale, and Hay Lin, respectively. Together, these five girls form the group "W.I.T.C.H."—will they be able to protect the Earth from Prince Phobos' schemes?