This summary might be more of a rant lol. This drama has so much potential ! after watching the preview on youtube I couldnt wait! This drama was a major let down for me, more than Love Script....

Female lead is in need of money to heal pay for her brother's medical bills , so she tries to become a maid in the Gu household. Female lead is cute and quirky, male lead is the Gu's son. He has a stone cold face and is good in making and designing jewelry. The leads start off on a wrong foot, like in many dramas.
In the Gu family , the father and mother has passed away, leaving behind the mistress ( which she never got a title to be the madam of the house). There is also mistress's son , Gu's 2nd son ( but he is not blood related) , and a third daughter which is the eldest son's blood related sister, but she got lost a long time ago and the grandma. Thus the grandma becomes upset and gets sick from missing the grand daughter. The grandma thinks that the female lead is her lost granddaughter... So our female lead is stuck in accepting the role. The female lead stays in the Gu household to find her long lost play mate from when she was young. She recognized him through a jade he has, and that person is Gu's second son, which she didnt know. So she develops a friendship with both the brothers. She slowly starts to fall in love with the male lead (the older brother) , he does too but doesnt show his love.
At this time the mistress aka 2nd son gu's mom comes back. She is obviously a evil character and is strict and mean. She is shocked that the third daughter is back because she was the one that sent someone to go after the third daughter. She questions the identity of the female lead.She tries to get rid of the female lead. The leads try to figure out what happened to male lead's mom and what the cause of her death was. Eventually they get the mistress to confess her evil deeds.
At around the same time the mistress is introduced, we get introduced to the second female lead. She grew up with the gu's oldest son and has a contracted marriage. She really likes him and doesnt want to give him up.Even though she knows that the leads are in love with each other. Some stuff happens and the male lead is forced to marry the second female lead. Second female lead does things to break them apart.....

RANT!!
1) Didnt feel the lead's connection, chemistry or passion
2) They had too little scenes together! not enough time to make their relationship feel real... The whole drama has a lot going on
3)unnecessary side character , which made the plot more annoying and nuisance . the mistress and the second female lead , even that doctor ( he had no use whatso ever)
4) this drama was slightly on the comedic side, but i didnt find it worked, in general I am not a fan of comedy/ ancient mixed together
5) overall storyline had to much going on and then it skips and jumped around. it doesnt offer any explanation of what happened , it just jumped to the next scene....
6) love triangle didn't help to develop the story.
7) too much focus on family issues

Honestly I must rather just watch the preview for this drama! it was done so nicely and made this drama seem like it was going to be a good one, but this one just flopped. The end part of it jumped like three years and I'm like what is going on.... The first half of this drama it was already like a 7 for me, just kinda bland and nothing really partially stand out..... it dropped a little more after what happen in he latter half... sighs..

I dont recommend, unless you have nothing to watch....