Prue helps a young witch who has been kidnapped, and renews her own faith in having children. Meanwhile, Phoebe finds out that Leo is hiding an important secret that threatens his relationship with Piper.

An assassination attempt on the sisters' lives forces Prue to go undercover as the woman who tried to kill them, known as Ms. Hellfire. While undercover, she becomes romantically involved with the man who hired the original Ms. Hellfire.