Plot
FMC is a martial artist, who is hated by a everyone in Murim for practicing "un-orthodox" martial arts (whatever that means). The only person she trusted was her lover, who betrayed her by feeding her poisonous fruit. After dying, she woke up in the body of a concubine of the emperor (who coincidentally died by the same poisonous fruit at the same time). Now, FMC seeks to become stronger and seek revenge upon her ex-lover. In the mean time, the emperor is falling in love with her because she finds her "interesting" and romance ensues.
Review
Comedy is the main strength of this series and some misunderstandings are hilarious. This is the main reason to read this series. Despite the tragic past and the general seriousness of the palace drama, FMC and emperor manage to make us laugh a lot.
The series raises your hopes with the badass FMC in the initial chapters, giving you hints of a power fantasy. But except for some rare [and brief] occasions of combat/training, FMC's entire life generally revolves around emperor + romance track. Despite being one of the strongest martial artists in existence, she is reduced to nothing but the same "honest but dumb eccentric woman" character trope that the ML (emperor) finds "interesting". After 60 chapters, we still don't have a single proper fight for FMC.
While we do have romance, I recommend reading this as a comedy. The writing is too inconsistent for me to take any of the plot seriously. The characters can become smarter or dumber, based on what the plot demands. We also have a bunch of forced misunderstandings that keep the characters separate.
Overall, if you keep your expectations in check and just read it for the comedy, it is a decent manhwa. The minute you start to take it seriously, all the glaring problems with writing surface and ruin the series.