In the film, Tang Kim says she didn't tell her story to her second husband, whom she married in 1980 but left four years later.
She cries as she recalls sucking juice from a cornstalk to survive during her escape.
vindictive
Struggling for reconciliation, she nonetheless admits she can never stop feeling vindictive toward her Khmer Rouge attackers.
If any are still alive, she says, she would like them to be "taken to be killed so that I can have some peace of mind."
"Blood must be paid by blood. I want my dignity back," she says, her voice rising in anger.
Youk Chhang said that the film would be released on Monday and shown with English, French and Japanese subtitles. It will also be screened every day for visitors at the Tuol Sleng Genocide Museum, a former Khmer Rouge prison in Phnom Penh where some 16,000 people were jailed before execution.
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