Shen Lingsu, the concubine of the Shen family, had her mother poisoned and died in front of her. She secretly vowed to find the murderer and avenge her mother. She thought that if she forbeared, there would be no disaster, but there happened to be a bigger conspiracy waiting for her.
Purpose: A concubine has an embarrassing status. It is very difficult to find a way out for yourself and find a suitable husband, because your mistress does not want you to live a good life, so you have to rely on yourself.