Now that Zankou has stolen the Book of Shadows, he learns he has to steal the powers from the sisters in order to be able to access all the spells and powers inside. Realizing what he has done, Piper, Phoebe, and Paige set out for one final showdown with the demon where their lives are at stake. Things get trickier for them when Inspector Sheridan leads a team of police officers to the manor, looking to take the sisters in for questioning.