A medical PhD from the 21st century dies in an accident on the night of an experiment. The day she transmigrates, she becomes a notoriously domineering, ugly woman, and now they're going to break her legs?
At the last moment, she turns the situation around and treats the prince's legs. Once they're healed, let me out so I can enjoy myself.
Deal!
Prince Yu decides to wait and see what tricks she will play. Who could have guessed she'd really heal his legs and transform from an ugly duckling into a swan?
But... the man goes back on his word. He has walled her in and won't let her leave.
The princess consort is on the verge of tears. "Your Highness, can't you keep your word? There's a whole crowd of handsome men outside waiting for me to dote on them!"
The prince pulls her into his arms. "Then I'll dote on you first."
I've read it, and it's pretty good. As a long-time reader of medical novels, I think this one is quite good.