 The Halliwell sisters are missing their cat Kit that disappeared. Actually it was stolen by the troubled and lonely teenager girl Aviva, who has conjured without knowing the evil sorceress Kali to become a powerful witch. Kali advises Aviva to use Kit to get close to Phoebe, with the intention of stealing the powers of the Halliwell sisters. While the silly Phoebe welcomes Aviva, the smart Prue investigates the girl with her aunt and discloses that she was lured by the evil spirit of the mirror. She joins her sisters trying to find a means to destroy Kali.