Isa Miranda essays the title role in Le Secret de Helene Marimon. In flashback, aging engineer Jacques (Frank Villard) recalls the great love of his life. After being wounded in WW I, Jacques makes the acquaintance of Helene (Miranda). He falls hard for her, never suspecting that she is actually the wife of his best friend. When he does find out, he elects not to tell her of his relationship with her husband. Only unhappiness can result from this deception, as the film's climactic scenes prove all too well. Director Henri Calef co-adapted the screenplay from a novel by J. B. Cherrier. ~ Hal Erickson, Rovi