Brothers Tull and Xavier try to force the wood nymphs to show them the Eternal Spring of new life that can render immortal anyone who drinks from it - by killing their protecting satyrs, so the Nymphs flee to a Frisco city fountain, where they become a TV subject. The Charmed sisters take the two who escaped the first demon attack in for protection, but nymphs need to mix with nature or both will wilt.
Review
The old 'lets turn him into a tree' device for sorting out the bad guy is used once again in this episode... oh, that's right, not so common but it's kinda funny to watch again and again, but still I forget what else happens, the witches do their thing, acting like typical siblings etc - no, you've guessed it, never really watched Charmed, but this episode is watchable for the non-fans of the series.