The old lady Vera in the nursing home rolled down the stairs with her wheelchair and died on the spot. The nanny Dorothy (Kathy Bates) who was taking care of her stood by with a weapon in her hand. Dorothy was the only suspect. It turned out that Dorothy was a maid employed by Vera for 40 years. Because she suffered from the scolding and perverted demands of her master, this case could easily lead to a murder of hatred and revenge. The police have always wanted to convict her and sentence her to 20 years in prison. This case alarmed Dorothy's daughter Salina (Jennifer Jason Leigh), who was a reporter in New York. She personally participated in the tracking of the case and reunited with her mother who had been separated for many years and lived together for a few days. This forced her to look back on the dark past, and Dorothy always suddenly recalled what her daughter looked like when she was a child. At the same time, a demonic figure was awakened by memory. That was her husband, who often committed violence against her. When she could no longer bear it, she made a final counterattack...