 Prue, Pipes and Phoebe are attacked by the evil warlock Nicholas that wants to kill them and steal their powers. The Halliwell sisters are unable to protect themselves since Nicholas is immune to the power of three. He tells that he made a pact with Patty Halliwell in the past and he is invulnerable to their powers. The sisters cast a spell and travel in time to 1975, trying to avoid their mother s deal with Nicholas. However, neither of them has power and they have difficulties to convince their grandmother and mother who they are.