Paige Matthews is slowly but surely learning the wisdom of a witch away from her sisters. One day, during her experiments, she turns into a cat. There is only one problem: she cannot turn back into a human herself. Piper and Phoebe finally realize the true identity of the lost kitten and rush to help their sister, but take with them another woman, also turned into a cat. She turns out to be a deadly witch, and the sisters have to team up with many to defeat her!