When Paige encounters Captain Black Jack Cutting, an 18th century pirate in search of the Fountain of Youth, the curse on his life becomes her problem. Meanwhile, Leslie manipulates a contest in order to spend time with Phoebe, Leo fights with the creature that caused him to kill an Elder, and a mysterious federal agent comes to town to investigate the Halliwells.

In an attempt to stop a demon on a murderous rampage upon his human relatives, Paige casts a spell that inadvertently blocks all death, and it's up to the Charmed Ones to make things right, when the Angel of Death wants the mess cleaned up. Meanwhile, Agent Brody reveals that he has been following the Halliwells longer than they thought, and Phoebe must deal with her feelings toward Leslie.

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.

Agent Brody and Paige investigate when they discover that the demon Sarpedon is capturing innocents' guardian angels and using them to protect himself from the new power. Meanwhile, Piper and Phoebe encourage Leo to go on a vision quest to face his demons.

Paige and Agent Brody, are drawn into an unfinished novel that takes place in the 1930s, and they must elude the gangsters in pursuit of the famed Burmese falcon. Meanwhile, Phoebe, Piper and Leo work to re-write the novel to help get Paige and Brody out of it, before they're killed.

Piper learns Leo is an Avatar, when he confesses to her, despite the objections of the other Avatars, who believe Piper should find out on her own. Meanwhile, Phoebe and Paige ask Kyle for help, but his reaction proves disastrous.

The Avatars enlist Leo to protect the Seer because she has information that could help them destroy the demons. Meanwhile, Brody reveals a secret to Paige, and Phoebe and Darryl continue to investigate Brody.

When Piper switches powers with Phoebe, to allow her to see the vision of the utopian world, Zankou interferes, and causes their powers to be transferred to innocent bystanders, who run amok. Meanwhile, Brody's murderious desires prompt Paige to take him on a journey back to his childhood to learn the truth about his parents' death.

At the same time that the Avatars are planning to transform the world into their envisioned utopia, Zankou kidnaps Brody and is forced to cast a paranoia spell on the Halliwell sisters.

Leo discovers that the Charmed Ones' conflict-free world comes with a higher price than anticipated, so he must join Zankou to stop the Avatars and reverse the change.