Unknown Opponent (Hungarian: Ismeretlen ellenfél) is a 1940 Hungarian spy thriller film directed by Endre RodrÃÂguez and starring Erzsi Simor, Andor Ajtay and Karola Zala. It was shot at the Hunnia Studios in Budapest. The film's sets were designed by the art director Miklós Velits.
A foreign power interested in a new Hungarian prototype aircraft recruit Adrienne to steal the plans, but she falls for László the engineer behind the new design.