Honestly, the mystery/investigation genre is my favorite genre when it comes to dramas, so I've seen a lot of them. This was my second mainland Chinese drama and I was frankly very pleased with it. As a frequent watcher of the genre, I absolutely loved this show. It draws and keeps your attention. Nowadays, it is very hard to find a drama that does that. The story was based on a novel by Ding Mo for the most part with some scenes that were changed. The last two episodes weren't part of the novel but added by the scriptwriters. The addition wasn't really necessary but I think the show may have a sequel, so that's why it was done. As for the plot, I'd describe it as dark, ingenious, clever, and mind-numbing. The writer and scriptwriter definitely put a lot of layers into the story but it was never too confusing to follow. Here and there they troll you but it added a level of depth to the drama. Oh man what can I say about the acting by this cast! Everyone's acting was pretty decent in my opinion. I think Sandra Ma did a decent job with her role but there were times when I just wasn't feeling her. Bo Jin Yan's character was intricate and multi-dimensional, and his expressions were on point. He stuck to his character till the end and his acting made him a pleasure to watch on the screen. I don't have enough praises for Wallace Huo's acting. I loved his bestie who was played by Wang Kai. His acting was very natural and refreshing to watch. I also liked Andy. You'll know who it is when you watch the drama ;) As for the music, the beginning instrumental was epic. It sounded like the Sherlock soundtrack and it was used as background music effectively in the drama. The ending is nice and slow-faced but it is not bad on the ears. I'd like to compliment the camerawork and cinematography of the drama too. As for the re-watch value, it is typical for a mystery drama. You already know what happens, so that's why it is so low. Overall, I'd recommend this drama to all viewers. Even if your not a mystery fan, the drama has a mix of other genres like romance too. It is one of the best dramas of 2015 I've seen this year by far.