Absolutely a masterpiece. In the vein of Kim Won-Seok's other works. Also a master class in acting from the entire cast. The story starts slowly...even meandering...gradually building depth and breathing life into the characters. Its quite unlike any other k drama...this is a human story...that shows you both the pain and healing that are a part of a life experience. Please give it a chance and you will be moved and rewarded for having done so.