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Amelia (Laura del Sol) lives with her sister in a lovely house in Valparaiso with a view of the harbor. She is comfortably well off, but for some reason during an evening outing, a doctor named Fernando (Franco Nero) takes her to be a prostitute. Already smitten with him, she allows him to take her where he will and pay her for her attentions, never letting him know that he is her only "customer." This goes on for some time. Later, however, the sisters' finances take a turn for the worse, and Amelia puts her amateur hooking skills to good use, that is until tragedy strikes.