Oscar Minno returns from working several years overseas and looks up his old flame Sandra.

Sandra is widowed and lives in a childlike mental state on her family's estate, cared for by the overprotective Countess de Blanc.

Sandra's son, Ricky, is suspected of having killed his father, Fabrizio, as well as a vagrant trespassing on the estate.

Oscar's doctor friend believes that Ricky is mentally fit and begins to suspect that there is much more to the story.

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