All warmth springs from woman, All light from love does flow – Truly, only the heat of a virgin's body can ignite your fires.

Two sisters are abandoned on a desert island. Costanza, the eldest, engraves on a rock the tale of her sad destiny. Silvia, the youngest, raised in harmony with Nature, faces the brutal revelation of a amorous commotion when two men, Enrico and Gernando, land on the island looking for them.