My first Kdrama with Lee Jong Suk as leading actor and it was great. Since then I watched a few more Kdrama with him as a leading role as he knows how to pick a great drama. It took me a while to be engaged with the story, the beginning was a little slow. But once the show got back to the present it started to be good and it hooked me till the end. The only flaw for me here is the female leading role, Park Shin Hye might be a great actress but in every series with her as leading role (the heirs for example) I couldn't relate to her, she has some kind of distance when she acts and its hard for me to empathized with the character.