Ep 12. Used Karma

Piper and Phoebe's powers are still swapped and they're getting use to their new abilities. Phoebe, being in control of molecular combustion, takes advantage of her power and saves an innocent from getting killed by blowing up the car of the demon chasing him. Meanwhile, Paige gets a visit from her parole officer, who informs her that she's been summoned to perform community service at a local community center.

At the community center, Paige gets to know the staff and participants, including a young troubled girl named Tyler. With her empathic abilities, Paige feels Tyler's pain and decides to help her using her magic. However, in doing so, she accidentally transfers Tyler's bad karma onto herself. She starts experiencing bad luck and is convinced it's because of the bad karma.

Piper and Phoebe use their swapped powers to try to reverse the effects of Paige's bad karma, but their efforts only make things worse. The sisters then seek the help of a Karma witch named Fortune, who warns them that there's a bigger reason for the bad karma and that it's linked to the opening of a demonic portal. The demon that Phoebe blew up earlier is trying to open the portal in order to let his demon brethren in and take over the world.

The sisters are warned that they must restore the balance of karma or else they'll be dealing with not just one demon but an entire army. Piper and Phoebe realize the error of their ways and decide to use their powers for good by helping the community center and giving back to the community.

Paige takes on more of Tyler's bad karma in order to save her from getting into trouble with a gang, but it's too much for her to handle. She collapses and is taken to the hospital where she's told that she's going to suffer from permanent bad karma if she doesn't reverse the effect. The sisters realize they need the help of Tyler to help reverse the negative karma. Tyler agrees to help and through her positive energy, they're able to restore the balance of karma.

As a result of their good deeds, the sisters are rewarded with good karma and their powers are restored back to their original form. In the end, the sisters, Tyler and the staff of the community center celebrate their good karma with a party.