In the city of angels, a beautiful woman stalks the night.
She is the Undine, exploited for her fantastic powers and her erotic prowess, forced by her own inhuman kind into slavery to humans. now the time of her imprisonment is over, and she is finally free to turn her fearsome anger upon her human tormentors.
Ambitious reporter Brian Kroft thinks he is following a crazy lead. But as his scoop turns into a dangerous chase up the Pacific Coast, he begins to close in on what seems to be the impossible. The more he understands about the Undine and her fellow rebel slaves, the more desperate he becomes to trap her--as he realizes to his horror, that mankind's future depends on him.