Her Highness' Survival Game

In a dynasty where women held the rank, the crown princess held a spirit pact that gave her power over the lives of her four consorts. She used it on them and humiliated them over a long stretch, and took what she wanted from her position. The four of them came to hate her. She was poisoned. Shen Fengqing, an office worker of the present day, worked overtime until she dropped and woke up in that body. The four consorts were still in the palace and each of them meant to kill her. She had a system to draw on and what she knew from her own time. She went at the four of them separately, working back through what the princess had done to each one and correcting what they had been told about her. Each of the four was keeping something of his own hidden. Elsewhere at court there was a group working against the Feng Kingdom for its own gain.