While Piper and Leo are away for a month seeing The Elders, Prue and Phoebe must face a series of demons known as Guardians, who help mortal murderers go free in exchange for the souls of their victims. After saving Darryl from a Guardian, Prue and Phoebe must testify in court, where it is later revealed that the judge and all the other people in the court room are demons. Phoebe falls in love with the District Attorney Cole Turner (Julian McMahon), however she does not know he is a demon sent by The Triad to kill the Charmed Ones. Meanwhile, Piper and Leo return and reveal that The Elders want them to end their relationship or else the sisters will get a new Whitelighter. However, Leo decides to propose to Piper in secret.
