The Princess Is a Hidden Boss

In her previous life, she was a bodyguard for a wealthy family, but she traveled through time and became an unpopular concubine in the Duke's palace. God gave her a chance to live again. She wanted to live well for the original owner and seek justice for the original owner. On the way back to the palace, he rescued the prince who had made great achievements in battle, and won a reward from the emperor for his knowledge of modern culture. Help the prince solve strange cases and achieve military exploits. The two are in love with each other...