King Minos sacrifices the 'required' virgins to the Minotaur. As his wife lies dying, she confesses that her daughter has a twin she has secreted to avoid giving one of the girls to the Minotaur. The daughter raised by Minos tries to have her twin killed, but failing in her first attempt, continues to try to have her given to the Minotaur. Theseus, the Greek hero, tries to prevent it.
Rosanna Schiaffino
as Princess Fedra / Arianna
Bob Mathias
as Prince Teseo
Alberto Lupo
as Chirone
Rik Battaglia
as Demetrio
Nerio Bernardi
as Re di Atene
Carlo Tamberlani
as Minosse, Re di Creta
Emma Baron
as madre adottiva di Arianna
Nico Pepe
as Gerione
Susanne Loret
as Anfitrite
Paul Müller
as Medico di Corte
Tiziana Casetti
as Illia, daughter of Xanto
Alberto Plebani
as Xantos
