When a trio of film students accidentally release an evil witch from the tomb that held her for 200 years, she kills them and then sets out to find her magical scepter that is needed to kill the Chosen One. As a result, Leo returns to town and asks for the Halliwell's help in keeping the Chosen One safe so he can destroy the evil witch.

When the water demon that killed the Charmed Ones mother 20 years ago returns and starts killing again, Prue, Piper, and Phoebe must face him at the same camp where Patty was drowned to death. While there, they meet Sam, their mother's former white-lighter and learn some shocking secrets about their mother, one of which mirrors Piper's relationship with Leo. Prue goes to some drastic lengths to vanquish the water demon.