Caterina finds out that her husband Peter Tzar of Russia, is plotting to kill her. She sets Count Orlov free from prison, Peter's sworn enemy, becomes empress of Russia and leads the Cossacks army against him.

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Main Cast: Hildegard Knef, Sergio Fantoni, Giacomo Rossi Stuart, Ángela Cavo, Ennio Balbo, Leonardo Botta, Raoul Grassilli, Tina Lattanzi, Vera Besusso, Gianni Solaro

Director: Umberto Lenzi

Writers: Guido Malatesta, Umberto Lenzi

Editor: Jolanda Benvenuti

Cinematographer: Augusto Tiezzi

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