Sarah Bailey, a troubled sixteen year old, moves to L.A. to start a new life and is enrolled into Catholic school. It's there she makes three unlikely friends: Nancy, Bonnie and Rochell are all social outcasts – and witches. When they notice Sarah has the powers of a natural witch, they talk her into joining their coven, realising that a fourth witch means they can cast new and more powerful spells.
The girls begin to amend all the troubles in their lives – but meddling with magic comes with a price.