In her previous life, a scumbag deceived her and used her to steal vital company documents, driving the company into financial ruin. He had her father sent to prison, then bought the company for a pittance.
Her mother couldn't take it and jumped off a building. She behaved terribly toward her childhood sweetheart, lashing out at him and treating him with contempt. She even kissed someone else right in front of him, yet he remained gentle with her.
Her best friend tried to warn her, but she suspected the two of them were having an affair, and they lost touch.
In the end, she had nothing. She became a laughingstock in City A, hated by everyone and treated like a rat in the streets.
Barely clinging to life, she chose to jump into a river and end it all.
Reborn in this life, she'll make the scumbag pay and leave him with nothing. She'll protect her family, friends, and childhood sweetheart.