Even though Leo (Brian Krause) is gone, Piper (Holly Marie Combs) is in a surprisingly good mood, leading Paige (Rose McGowan) to suspect that Leo altered Piper's memory. However, Paige's spell to restore Piper's memory accidentally causes total amnesia. Calling upon Leo for help, Phoebe (Alyssa Milano) and Paige discover that he is being held captive on the Island of Valhalla, a mythical place ruled by warrior-maidens. Trying to cover up his involvement in Leo's disappearance, Chris (Drew Fuller), the girls' new Whitelighter, helps them disguise themselves as Valkyries and orb onto the island. The sight of Leo causes Piper's pain to come flooding back, prompting her to stay behind on the island while everyone else escapes. The Valkryeis follow Paige and Phoebe across dimensions to San Francisco and wreak havoc on the city. Meanwhile, Phoebe discovers she has a new power and Paige takes a job as a dogwalker and is amazed when one of her dogs is transformed back into a man (guest star Evan Mariott).
