The sisters must stop a warlock from executing his plan to steal specific powers from witches in his attempt to kill every whitelighter in the world.

While the sisters must deal with the possibility of being separated as the newlyweds plan to move out on their own, they recall a time before they knew they were the Charmed Ones, when the girls were coming to grips with the death of Grams and Phoebe's departure to New York.

Paige accidentally summons a medieval knight, who believes Paige is the love of his life. However, the knight is under the influence of an evil sorceress.

Amongst newlyweds, Phoebe & Cole and already-married, Leo & Piper, Paige begins like a fifth-wheel but she continues her suspicions about Cole. Meanwhile, the Source plots to impregnate Phoebe with his evil spawn.

When a demon coerces a boy into turning him into an evil comic book villain so he can steal an Elder's powers, the boy transforms The Charmed Ones into comic book heroes with superhuman strengths to prevent this from happening.