Finally finished the long ride. You can watch all here:
https://www.youtube.com/playlist?list=PLMf7VY8La5REE78dAL0jvZzGV-ri-UW2P

I really liked the idea, a pitiful girl taking revenge on everyone including her ex. Blamed for everything, wrongly accused, child stolen, faking death, taking revenge, birth mother and daughter... I think all the KDrama cliches were in this drama. I like the way she took revenge step by step, aiming for one goal, the revenge. However, at one point the protagonist became a bit forgiving, that I got bored sometimes.
For the plot I could have given full 10 if:
1. The kid was actually dead
2. Not the daughter
3. The father was also dead

Cast could have been better... but I'll give them a pass cause the whole story was basically harmful and negative, that it was always glaring and shouting at each other.
Music, I really liked the piano BGM during the intense scenes.

The drama basically reveals everything in the beginning, so once you watch it, you will get it.