The Valentines plan to unite Mona McAllister, a recently divorced movie critic, and her new next-door neighbor Duncan. But Mona's dog, Clovis, seems intent on keeping them apart as he's vicious towards Duncan. When the Oracle reveals to Phoebe that Mona and her dog are true soul mates, Danny and Kate seek help from Aunt Circe. She is an ancient witch, practiced in the art of metamorphosis. Meanwhile, Grace and Leo refuse to believe that Danny was assaulted in the mansion. Ari pays a threatening visit to Circe when he gets wind that the Adamantine blade will soon be arriving in Los Angeles.