While working for Grandma Callaway, Paige becomes the witness to a dangerous magical family feud going back for generations. The Halliwell sisters try to help Richard Montana end the feud before it escalates any further.

Paige is forced to make a deal with a demon, in order to recover her boss's soul. Meanwhile, Piper learns that Wyatt has been sabotaging her dates, Phoebe gets a new writing partner, and Chris and Leo accidentally travel back in time.

The Charmed Ones are called upon by The Lady of the Lake to help protect Excalibur, the legendary Sword in the Stone. Meanwhile, numerous magical beings arrive at the manor to try their hand at pulling the sword from the stone, but it's Piper who finally pulls Excalibur out of the stone, causing a surprise figure to appear.

Bianca, a woman from the future, arrives to take Chris's powers, and Leo learns that she is actually part of an assassin family of witches. Meanwhile, Paige decides to move in with Richard, while Phoebe ponders joining Jason in Hong Kong.

Jason breaks up with Phoebe when he finally learns her and her sisters are really witches. Meanwhile, Richard attempts to free himself of his family's karma, and Piper and Paige try to vanquish a group of Swarm Demons, the last on Chris' list of the most significant threats to Wyatt.

When Phoebe frees a genie from a bottle, she soons finds that she must take the genie's place. Meanwhile, anxious to put Leo and Piper back together, Chris uses Phoebe to make his wish come true, but she takes his instructions too literally.