If you are even slightly interested in watching this kdrama, just be ready to waste the next 12 hours of your life. This is the most poorly written kdrama that I've watched EVER. The main characters were so arrogant and rude, they made everyone follow them using violence. Apparently they like the zombies more than humans. There were so many times when the poor actions of the main characters endangered the rest of the characters. The main leads had no chemistry at all. This is for sure not a zombie series since they don't use the word zombies even once. They took the concept of zombies and turned it into something bizzare.
SPOILER ALERT
All of the characters turn out to be bad except for 2 and the main characters. The writer even made Andrew a serial killer out of nowhere, i was hoping his character to be someone interesting since he wanted superpower as a kid but no turned out to be a serial killer. And they killed the 15 floor guy for no reason at all. This drama is so bad that I wish I could turn back time just to not watch this show again.