She was a female teacher. After falling out of love, in order to earn money to pay off her family's debts and send her younger siblings to school, she secretly did unspeakable things while working. She contracted an incurable disease and was discovered by her former lover. In order to retaliate, she refused his help.
Later, by chance, she came to Beijing and found that her sister, who was studying in college, also secretly worked as a call girl...