Recently divorced movie reviewer, Mona McAllister (guest star Ana Gasteyer, "Saturday Night Live") and her beloved dog Clovis are new to the city. Mona's next-door-neighbor, Duncan (guest star Josh Malina, "The West Wing") may be an interesting romantic prospect, but Clovis seems intent on keeping the two apart. When the Oracle reveals to Phoebe (Autumn Reeser) that Clovis and Mona are true soul mates, Danny (Kristoffer Polaha) and Kate (Christine Lakin) seek help from Aunt Circe, (Ann Magnuson) an ancient witch practiced in the art of metamorphosis. Meanwhile, Grace (Jaime Murray) and Leo (Robert Baker) refuse to believe that Danny was assaulted in the mansion and Ari (Greg Ellis) pays a threatening visit to Circe when he gets wind that the Adamantine blade will soon be arriving in Los Angeles.