As the end credits of this drama say, after all, evil things start in the hearts uf us humans. This drama skillfully connects absolute darkness with unshakable will to fight, it connects the dark depths of the human soul with the hope for some light.

I started this drama because I was curious about how such concepts like horror would be executed in a kdrama. I was wondering how scary it is. It is scary. It is cuel. It is bloody. It shocked me, but it also fascinated me. It was shot perfectly, with an artistical uniqeness - it was in its very own dark way aesthetically pleasing. The start is strong, intense, dark. I feared that it would continue like that and never reach real depth. I was mistaken.
Let me tell you, this is, in a really strange way, the most beautiful drama I've watched so far. You might wonder now, how I (as someone who doesn't even like horror series), could call something cruel like that beautiful? ... Well. The characters showed, that even in the pitch black darkness, even in the hopeless vortex of death and murder, there is something, or someone to fight for. In their own way, they showed the weirdest, but most beautiful friendship I've ever seen in a drama.

I found myself being an emotional wreck because of this drama, it made me think a lot, it scared me from time to time, it made me cry a lot, but most importantly, it made me enjoy it. And that was only possible due to the absolutely outstanding cast, the actors were chosen perfectly and they acted it out in an outstanding way. They perfectly conveyed all kind of emotions, reactions, behaviours, in this very dark, very depressing story. Thanks to the excellent script, it however wasn't senselessly dark. It communicated a meaningful message. The message to fight for what's worth to fight for.