Ex Libris

After a classmate of Phoebe is murdered by a demon to stop her thesis proving demons exists from being published, Phoebe and her sisters set out to vanquish the demon called Libris so a past victim can move on to the next plane of existence. However, the ghost is unable to move on until she helps Prue solve the murder of another young woman. Piper's preparation at the club for a performance of the Goo Goo Dolls is cut short when Dan arrives with some surprising news about Leo.