The Charmed Ones face a demon who has been killing Leprechauns and stealing their magic but when the Leprechauns endow the sisters with good luck, which enables Paige to gain material wealth, Phoebe to meet a man, and Piper to book a major star to play P3, plans backfire.

When the mythic Gods, the Titans, are released and kill all the elders, Leo is forced to take over. Meanwhile, a mysterious Whitelighter from the future guides the Charmed Ones when Leo gives the girls the ultimate power to vanquish the Titans, recreating them as Greek Goddesses, despite the risk that they will be seduced by their vast new powers.

Now all powerful Greek goddesses, the Charmed Ones must try to not be seduced by their new powers and stay focused on vanquishing the Titans before they destroy all the whitelighters. Meanwhile, Leo must decide whether to become an elder or stay with Piper & Wyatt.

In an attempt to destroy the reputation of the Charmed Ones, Billie & Christy resort to trying to make the magical community see that the Halliwells only care about themselves. Meanwhile, Phoebe begins to lust after Coop; Paige cannot hear her charges' call for help; Piper becomes the perfect 1950s housewife.