Magical twin sisters are separated at birth by their protectors, Karsh and Ileana, when the Darkness attacks their homeland of Coventry and kills the twins' father through a war that is going on. They survive because their father, Aron, gave all of his magic to the twins and whenever they are together they are safe; their combined power is enough to fend off the Darkness.
For their protection, Karsh and Ileana flee Coventry and hide the twins safely in a non-magical dimension. Camryn grows up in an upper-class family and becomes a social butterfly. She wears an amulet shaped like the sun, and always awakes with the sunrise. She likes to draw, and unknowingly draws extremely realistic pictures of Coventry and her birth mother, Miranda. Alex grows up in a middle-class home with a single mother who died recently. She wears a moon amulet and is always up until the moon sets. She is a bookworm and is always writing stories about Coventry and their mother, unaware they are true.
On her 21st birthday, Camryn and her friend, Beth, go shopping, while Alex goes looking for a job. At a fashion store, the two sisters meet for the first time. Alex goes running from the store, and Camryn goes after her. When she takes her hand in hers, their magic is released. They bond as sisters, trying to understand what has happened to them, and get to know about each other's lifestyles. Camryn manages to convince Alex to stay and the two bond and manage to cast a few spells. They come up with the name Twitches, a fusion of the words twin and witches.