The drama has 2 storylines set in different times.

Switches between the story/timelines in this drama are done messyily and out of proportion. It can make it hard to follow.

However, the storyline set in the present has something interesting to me. It has some suspense and it knows how to make you feel frustrated in an entertaining way. The acting is done amazingly. The acting of the past timeline is also amazing, but I just didn't feel the story. It was a sad story, but I didn't feel entertained by it.

I think they should have made 2 separate dramas for both the present and past timeline. That way both stories would have been told a lot more neatly and perhaps even it would make us feel a lot more interested.

It is not a bad drama, but it also is not the best. I advice you to watch the first 2 episodes and decide for yourself. Don't blindly take advice from other watchers as this really is something you should give a go for yourself to decide whether it is worth your time or not.