Shen Sangning is the "non-existent daughter" who has been hidden in the attic by the Shen family for eighteen years. Her parents were a philanthropic couple in the shopping mall. They were loving and respectable in public, but they regarded her as a lifelong shame - she was the offspring of her mother who was violated by her enemies.
When the real Shen Mingzhu, the daughter of the Shen family, returned from trouble, Shen Sangning was pushed out by her parents to humiliate her sister, protect her from disasters, and bear all the suffering that should have belonged to Shen Mingzhu for her sister. She thought that forbearance could bring a trace of mercy, but she only got one sentence from her parents: "Why don't you die?"
After being forced to donate bone marrow and watching his only lover sent to prison by his parents, Shen Sangning jumped off the cliff.
However, God gave her a chance to do it again.
Back when I was eighteen, all the damage had not happened yet. This time, she didn't want to be the daughter of the Shen family, she wanted the Shen family to cease to exist.