When a blue moon causes amok at the same time the girls are assigned a new whitelighter, thanks to the Elder's suspicion of Leo, trouble brews. Meanwhile, Agent Brody tells Paige of a powerful new threat, and Phoebe & Leslie confess their true feelings for each other as Leslie prepares to leave.

When Daryll's friend is possessed by the spirit of an innocent killed in a fire in 1899, Phoebe and Drake transport themselves back in time to the caberet where it happened. However things go from bad to worse, when they find they cannot travel back to their own time. Meanwhile, Piper convinces Leo they need to take a family vacation.