Suspecting that Billie and Christy are the "Ultimate Power," Phoebe and Piper formulate a plan that will provide the answers they need to get Leo back. Meanwhile, Paige saves her new charge Mikelle from two Darklighters, and Christy traps the sisters in a dream state in order to prove to Billie that each of their "inner-truths" are driven by selfishness.

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