My Daughter, Geum Sa-wol

Sa-wol, Hye-sang and Oh-wol grow up in the same orphanage as best friends. On the day the orphanage collapses, Hye-sang finds out that Sa-wol is to be adopted by her wealthy biological father instead of her, since a DNA test reveals the mix up between them. Eager to be raised in upper class society, Hye-sang traps the orphanage director, who is also her true father, in the collapsing building with Oh-wol to hide the truth. However, when Sa-wol ends up being brought into the family as well, Hye-sang starts tormenting, blame shifting and burying the truth, to make herself the better daughter. As the story continues, her web of lies gets bigger and bigger, and becomes harder to control.