What a lovely dorama! In the short span of four episodes, the authors managed to craft a wonderful, heartwarming, delicate, touching and poetic story that deals with deep issues like loss, guilt, tragedy, family, friendship, love. The main character is often called a "ghost picture detective", but "soul detective" would probably be a more precise definition. I literally loved every single minute of this hidden gem! Perfect script, great acting, nice score...such a pure, refreshing little masterpiece, as far as I'm concerned!