The female protagonist is an unpopular concubine in the Shangshu Palace. She is gentle and restrained on the surface, but is actually smart and tough. She is good at medicine and spice making. She relies on her wisdom to survive in the deep house. The male protagonist, Prince Jingnan, is a playboy on the surface, but in fact he is disguised as an old case. He is both civil and military, hides his secrets, and is extremely protective of those he identifies.
