- HD 1080
- Runtime: 174m.
- Status: Released
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- Languages: fr
- Country: France
- Director: Jacques Rivette
- Stars: Sandrine Bonnaire, Laure Marsac, Françoise Fabian, Christine Vouilloz, Mark Saporta
- keywords: subway, death of father, revenge
- Production_studio: Sofinergie 4, Pierre Grise Productions, T&C Film, Alia Films, La Sept Cinéma, Canal+
- providers: Cohen Media Amazon Channel
- The Secret Defense is featured in the top rankings of 1998
- #39 in Top Crime Movies of 1998
- #37 in Top Thriller Movies of 1998
- #11 in Top Mystery Movies of 1998
After biologist Sylvie discovers her brother Paul trying to steal a gun from her lab, he explains that he wishes to avenge the death of their father whom he suspects died at the hands of his business partner.