Unknown Woman (2017)

Story little different than lie after lie ..
But same thing is mother's feeling for her child,
Fight for her child.

Both drama are about revenge. The main girl is abandonned by her boyfriend due to circumstances. Contrary to "Unknown Woman" the boyfriend is not a jerk! But what is important is that the main girl is Lee Yuri! She is so pretty when she takes her revenge!!!

Both have strong female characters. In both dramas the female lead are also mothers who endure a lot and fight for the sake of their child.

The grandmother in both are similar: Both on the father's side, bullying of the female lead and favouring the grandson.

Similar plots a character in this show worrying about her child and does whatever it takes to protect him and Female lead character trying to take revenge for her child by taking advantage of the Male lead.

It has a Veryx100 similar plot and any person who has watched 'the promise' would straight away realise the similarities between the two dramas.
1.Both leads lose a parent
2.both also have a biological parent without knowing
3.get betrayed by boyfriend who chooses another women with the intention of becoming successful
4. Lose a child
5.revenge begins ,to take down the whole family and take over the business.

both dramas are about a female lead being betrayed by a male lead but unlike miss Monte-Cristo the woman didn't lose the child forever the child was taken from her and the child death was faked by a wealthy and level family who throws the female lead in prison, both k-dramas are about designers. to get revenge she faked her death and come back as a famous lawyer. to destroy the family who took away her child and killed her father.

Both about family betrayal
Both have a strong FM
Both seek revenge
Unknown woman is a K Drama while Return of the Heiress is a C Drama