Piper, Phoebe, and Paige learn that a warlock is in the process of kidnapping and enslaving the muses inside a special ring in order to make the forces of evil more powerful. As a result, they have to find a way to save the remaining ones and rescue the others before the warlock's plan comes to fruition. Meanwhile, Cole starts to get frustrated that Phoebe has so far spurning his marriage proposal and is worried that without his demonic powers, he'll be unable to help keep her safe from the demon factions who plan on attacking the Charmed Ones.