The Prince's Concubine Is Cruel and Poisonous

My sister rescued a man on the edge of the city. She took the man home and took good care of him. Later, the man's fiancée came to the door and killed the sister with a sword. She said that Sister A was of low status and could not be the savior of King Jin. This kindness will be replaced by her. Later, she married Prince Jin with the grace of saving her life and became the concubine of Jin that was envied by everyone, while I became the lowest concubine in Prince Jin's palace.