While Piper and Leo are away, Prue and Phoebe must face a series of demons known as Guardians, who protect mortal murderers in exchange for the souls of innocents. After saving Darryl from a Guardian, Prue and Phoebe must testify in court, where they stumble upon an evil conspiracy. Meanwhile, Phoebe falls in love with the new district attorney, Cole Turner.

Prue, growing weary of her battles to save innocents and in fighting off the Angel of Death, is forced to turn her back on a dying soul, and must come to grips with her feelings towards fate and the death of her mother.

Phoebe and Paige search for Leo after Paige accidentally causes a ""chipper"" Piper to have amnesia, but the sisters soon learn he is being held on the mythical Island of Valhalla. Unfortunately they have no idea that it's because of Chris and his mysterious plans. Meanwhile, Phoebe discovers she is now an empath, and the dangers of this newfound power.

Phoebe and Paige search for Leo after Paige accidentally causes a ""chipper"" Piper to have amnesia, but the sisters soon learn he is being held on the mythical Island of Valhalla. Unfortunately they have no idea that it's because of Chris and his mysterious plans. Meanwhile, Phoebe discovers she is now an empath, and the dangers of this newfound power.