The Charmed Ones, modern-day urban witches, Phoebe (Alyssa Milano), Piper (Holly Marie Combs) and Paige (Rose McGowan), move into Season four with deeper, darker and more deftly crafted stories. As Piper and Phoebe struggle with the loss of their older sister, they discover the existence of half-sister Paige Matthews. Possessing the power to orb as a half-Whitelighter, Paige joins the Halliwell sisters to recreate the magical triad that protects the innocent and vanquishes evil. But all may be lost as Cole's (Julian McMahon) demonic side takes over, and Leo (Brian Krause) must face his past if he is to help the sisters in a battle that could destroy them all. With intriguing characters, amazing special effects and the perfect brew of suspense, drama and humor, each exciting episode in this fascinating supernatural series casts a gripping spell.