The supernatural siblings inherit their grandmother's San Francisco manor, learn they came from a witch coven, experiment with witchcraft, and discover they've been targeted by various warlocks and other evil entities. An ancient, antique green covered book rests at the bottom of the trunk in a thick pile of dust.
Phoebe reaches in, takes out the book, 'The Book of Shadows'.
Phoebe opens the front cover to see a centuries old woodcarving of coven of three women gathered around a circle, casting spells. And, on the first page an elaborately scrolled incantation. Hear now the words of the witches. The secrets we hid in the night. The oldest of spells are invoked here.