When the Lady of the Lake arrives at the Manor, looking for help in protecting Excalibur from several axe wielding demons, the sisters gain some assistance from several magical beings. However, when Piper accidentally pulls out the Sword in the Stone, everyone worries that the power of wielding the sword might go to her head.

When Chris' girlfriend from the future comes to bring him back to the future and steal his white-lighter powers, the Charmed Ones discover the reason why he came to change the past. As a result, they have to race against time to get him back to the present and keep him safe.