A nobleman's daughter played by Jeon So-nee is framed for murdering her entire family and she escapes with her handmaiden played by Pyo Ye-jin. They end up in the capital where they disguise themselves as men and So-nee ends up in the palace as a eunuch serving the Crown Prince played by Park Hyun-Sik and Ye-Jin work serves a nobleman who spends his time investigating crimes using a scientific approach. There is of course the usual palace intrigue with various factions competing to get the upper hand to appoint their candidate as the Crown Prince. The storyline has been done before but the cast do a great job and it is still entertaining and the relationship between the leads is a believable romance.