While Buffy is busy trying to uncover the mysterious new Big Bad known only as "Twilight," Giles takes on a mission of his own that will require a Slayer who can handle a little dirty work. He recruits the notoriously rebellious Faith for an undercover job that demands her well-known penchant for violence. She must infiltrate the estate of a rogue Slayer and put a stop to this girl's evil deeds no matter the cost.