I enjoyed this Drama, but also yelled at the TV as the FL was made unintelligent at some important point, but at the same time she did a great job acting which was making us mad.
Looking at some reviews and felt they were lower than it should be because of this.

This story was a girl named wen su jin the dtr of a general. She is playful and carefree and at the same time causes problem for her step sister wen su yu who takes the blame a few times while growing up. At the age of 17 the wen family receive a notice from the Dowager empress and Highness Yu to marry there dtr Su jin at the same time Prince Xiao Qi appears and claim that he had a marriage arrangement when they were kids.. Now it a problem as su jin doesn't want to get married so her sister tell her to runaway and see there dad for help. While roaming she meets a man named Zhong Li and they go on a life/death journey together being hunted to going off a cliff. While running away she has a dream that her sister is getting married, by the time she returns her sister enters the carriage. It turns out she is in love with prince Qi and figure out she could marry him, but his mother doesn't agree and she ends up married to prince yu. Now sujin feels bad and again has dream that her sister is poison and so with the help of Zhong li(aka prince yu) she enters the palaae as a maid.
Here they go on a life and death tribulation. Great story of a love romance between the prince and sujin the maid begin and they deal with jeousley, hate, lies, loyalty, love, happy, sad. So many emotions only need 1/2 tissues near the end. You must pay attention to everything that happens as the ending will blow you away
Enjoy