The Power of Three will set you free!

Protectors of the innocent, the Charmed Ones-sisters Piper, Phoebe, and Paige-believe their days battling the forces of darkness are behind them. With everything at peace in the world, the sisters turn their attention to living private lives...until a dangerous new power intent on stealing their magic-and that of all of the world's witches-emerges.

But even as this new threat confronts them, mysterious forces reunite the sisters with Phoebe's ex, the half-demon half-mortal and entirely dead Cole, and their beloved sister, Prue, giving them the power to defeat the powers of darkness yet one more time.