A Prescription for Revenge

The woman who arrives at the marquis's house on the wedding day is not the Lin Wanrou who was raised there. That one died badly, and her ghost asked for help. The Lin Wanrou who answered is a doctor from another world with the same name, and she comes across through the Book of Fate to take the life over and change where it goes. Nobody in the house knows the difference. Everyone in that house wants something out of the marriage. Xiao Yuan and Su Meier set her up in front of other people, her stepmother works on her from inside the family, and the rest of the household join in when it suits them. She gets herself out of each of these. She treats Xiao Yu's leg and draws the poison out of him. She opens a clinic that charges nothing. She takes over Baicaotang, which has been going under, and puts the marquis family's businesses back on their feet.