With the Book of Shadows finally in his possession, Zankou (guest star Oded Feher) plans to open the Spiritual Nexus and take in the power of the Shadow. To divert Zankou's attention away from the Nexus, Piper, Phoebe and Paige successfully goad him into coming after them instead. Using a spell from the Book of Shadows, Zankou steals Phoebe's premonition power, which enables him to anticipate and thwart their attacks. The sisters come to the realization that the only way to stop Zankou may be to sacrifice themselves.