Acting on Phoebe's premonitions, the sisters race to stop a mysterious killer from striking again. Meanwhile, Prue finds a truth spell and uses it to find out what Andy's reaction to her being a witch would be.

When Prue is framed for stealing from the auction house and arrested, it is revealed that her boss, Rex, is a warlock. It's up to Piper and Phoebe to prove Prue's innocence and vanquish Rex before its too late.