Su An'an was abandoned when she was a child. When she grew up, her mother and elder sister, in order to take advantage of her, lied to her that her sick adoptive mother had been sent abroad for treatment. In fact, her elder sister had already pulled out the oxygen tube of her adoptive mother, which led to her adoptive mother's death. After learning everything, Su An'an embarked on a revenge path with a dark heart. You, sister, will pay back everything that I have lost.