Old, rich, and deeply rooted in witchcraft, the Petronio family's youngest daughter is getting married. There's just one problem: the mother of the bride, Mutya, is an evil witch—and she's out for vengeance.

Kelly hasn't been planning weddings for very long, but she takes the job despite her misgivings. However, the wedding will be taking place at Chateau Petronio, where her film director father once tried and failed to shoot a horror film. Where Kelly, at the age of eight, came across a mirror that enabled her to See the Unseen and changed her life. Suddenly, she's not so sure the Petronios picked her just for her resume. With the help of a motley crew of witches, can she defend the wedding from Mutya, solve the mystery behind the mirror, and impress the bride's attractive older sister Marga—all in one night?