Italian naval secret agents acquire a British codebook and the Italian counter-espionage agents start tracking enemy agents working undercover in Italy and providing false information.

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Main Cast: Mara Lane, Eduardo Ciannelli, Giorgio Albertazzi, Paolo Stoppa, Hans Hinrich, Franco Barbaro, Aldo Saporetti, Corrado Annicelli, Franco Caruso, Adriana Danieli

Director: Francesco De Robertis

Writer: Francesco De Robertis

Editor: Eraldo Da Roma

Cinematographer: Carlo Bellero

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