A young woman is hired to care for an elderly man who lives on an island off the Greek coast. When she arrives there the man warns her that his daughters are evil and dangerous. The woman discovers that one of the daughters is a crazed nymphomaniac who pursues, and seduces, everyone in the house, including her crippled sister.
In a small village, somewhere in France, German soldiers, killed and thrown into the lake by the Resistance during WWII, come back.
A girl arrives from London to visit her estranged relatives in a remote castle for the reading of her father's will. After a while she discovers that they are all in fact dead and her decision to live with them turns into a nightmare. Unable to leave she's drawn into a macabre underworld through visions of nude satanic rituals and her own impending sacrifice.
