Princess Agents (2017)

The series is set in an imperial era where slavery is still ongoing and strong. Xing'er who fell into the abyss when fighting and lost her memory. Xing'er was saved but was later made a slave. Incidentally the palace was holding a hunt with female slaves as its object. Xing'er became one of the hunted by the young masters in the palace. Among the many women, only Xing'er survived despite severe injuries. She was then taken to the Qishan palace, home of one of the palace officials to be a servant.
In the house has a young master named Yuwen Yue who is famous for being cold as snow. At the house Xing'er met his adopted brother. However, one of his sisters named Linxi was killed by Yuwen Yue in front of his eyes because of the alleged murder of Yuwen Yue's grandfather. Xing'er was determined to take revenge for the death of his brother to Yuwen Yue. It so happened that Yuwen Yue was looking for a maid who was only meant for silver servants. Whereas Xing'er is an iron steward who is the lowest stratum steward. For his hard efforts Xing'er was allowed to take part in the competition. With his intelligence and extraordinary abilities Xing'er managed to become a servant of Yuwen Yue's room.
Xing'er's extraordinary ability makes Yuwen Yue trust her to become a royal spy. Yuwen Yue also taught herself various martial arts and tricks in warfare. In the process the seeds of love emerged between them. But all did not go smoothly. There are many people who don't like them because of various interests. Including young masters who also like Xing'er a lot.
When Xinger intends to devote himself to Yuwen Yue, he discovers the fact that it turns out that Yuwen Yue's grandfather was not killed. His brother's death was only to cover up the lie of his grandfather's death. Feeling lied to by Yuwen Yue Xieng'er, Prince Yanxun's invitation to return to his hometown, Yanbei. But apparently not the peace that Xieng'er got when following Yanxun, but war for war. Moreover, having to face reality, the entire Yanxun family was slaughtered by the emperor because of accusations of rebellion.