Ruthless Grace: Mafia Queen

Scarlett Whitmore ran the Kirin gang and died running it. She comes back in the body of the Whitmore family's real daughter, the one her stepmother, Mireille, sold off to a mountain village as an infant so that an adopted girl could take her place. Scarlett walks back into the city with a fighter's hands and no interest in being polite about any of it. She takes apart the adopted sister who has been living her life, and she goes through the stepmother without slowing down. To get leverage on the rest, she signs a marriage contract with Theodore Vaughn, the idle Vaughn heir who was her rival in the life before. Both of them treat it as a transaction. Then they start fighting the same people, standing next to each other, and something that belongs to the previous century wakes up between them. Theodore's older brother Jerome wears the family's respectable face and is arranging to have her killed. When the shooting starts she puts herself in front of Theodore, and he is prepared to spend his own life to get her out.