El entomólogo Arturo Fabre, estudioso de la vida de los insectos, está casado con Irene Gorenko, una actriz rusa que trabaja en el teatro en México. Una extraña fotografía de Irene con una carta en ruso desencadena en el marido una obsesión por conocer el pasado de su mujer.

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Arturo Fabre, a professor of entomology, is married to Irene Gorenko, a Russian actress who has adapted well to life in Mexico where she has resumed her acting career. A letter written in Russian accompanied by a strange photo of Irene has a great impact on Fabre and he becomes obsessed with finding out about his wife's past in Russia.