The Lady of the Lake appears before the Charmed Ones, pleading for their help in protecting Excalibur, the legendary Sword in the Stone. A dozen magical beings arrive at the manor to try their hand at pulling the sword from the stone, but it is Piper who pulls Excalibur out, causing a whirlwind that coalesces into a mysterious figure called Mordaunt. Piper is unaware that she is meant to pass it on to Wyatt, heir of Excalibur and the next King Arthur. Richard realizes that Mordaunt cannot be trusted, but before he can intervene, Mordaunt tricks Piper into relinquishing the sword and its power to him.