After the sisters witness a child being kidnapped in the park, a journalist witnesses Prue use her powers to try to stop the kidnapping and vows to expose her secret. As she deals with the journalist, Piper and Phoebe learn that the kidnapper is a Grimlock and its motive is to kidnap young children in order to steal their eyesight and set out to find out the best way to destroy the demon. Piper makes a surprising discovery about Josh. Andy finally learns about the powers that the sisters hold.

Piper is surprised when Leo returns to town, looking for her help in protecting an innocent woman from being stalked by demon stalker. It is only after Piper casts a spell on Leo that she discovers that he is a whitelighter assigned to protect the Charmed Ones. As a result of the spell, Prue and Phoebe's powers get switched as well and as a result, their powers are weak when they go up against the demon, but ultimately are able to save the day.