Daughter and Concubine

She was originally a concubine, but in a sudden change, she actually exchanged souls with her sister-in-law; Wearing her sister's face, she saw another ugly world; Her brother killed her, but she could only bear it with tears; With superb medical skills and the blessing of a "magic soldier from heaven", can she turn things around and avenge her mother? However, the road to revenge is long, and after stepping on thorns, I realize that everything is not as simple as imagined...