Charmed Season 10

"The Power of the Three was threatened when their dead sister, Prue, was resurrected in the body of a coma patient. For a time, the sisters' magic was thrown off balance ... but now, having relinquished the Power of the Three, Prue has been imbued with the magic of the Nexus of the All, a mystical convergence with untold potential. Though the Power of the Three is once again in harmony, Prue must never leave the location of the Nexus, or the sanctity of magic as a whole will be compromised"--Back cover of Volume 1.