White Christmas is a psychological thriller. Mystery is important in the beginning, but that is not the focus of the drama. Instead, this drama focuses on human behavior and begs the question: "Are killers born or made?". I admit this drama is a bit boring at the start, but you really have to stick to it. I even dropped it the first time I tried watching it, but I'm so glad I made the decision to go back and finish it. The conclusion does not disappoint. I have actually watched this drama 4 times. I have only ever rewatched one other drama, and I only rewatched it once. I notice new things every time I rewatch White Christmas, and I love every minute of it. A huge bonus: The fan videos of it are great! (But I don't recommend watching fan videos until you finish it, as there are spoilers in most of them.)