beta
The kidnapper may be Eunhwa construction company, they won the competition between construction companies by cheating.
The favorite to win Taewonn (Taeju's group) lost the big project to them, and has been hindering the project progress ever since. Eunhwa wants revenge, and now that they has paid for the information to both (Sahyeok and Yeongdo) they will have a bargaining chip in her hands (Euiyun). <--- ch 60 official .
Or for the drama I bet on the 2nd option: the two received more money to kidnap Euiyun themselves and hand over to them.
The big question: I know he is capable but will Taeju kill his father-in-law? Maybe there, Euihyun is close and shouts not to kill him?
Since Euja is so good at redemption arc I bet we'll have grandpa redemption too? I keep dreaming about this ヾ(☆▽☆) they can end up with a big family like Tadaima, Okaeri --> Mafia Boss family problems.
Relying on Euja's creativity and good humor, grandpa would become protective with his grandson, loving his family. I need a sequel to this recovered alpha pls, he's handsome. Maybe he will try to recover the relationship with Euiyoung dad? omg I'm going far haha.