It was a mystery. A loud bang followed by tremors and the stench of vile and ancient beings escaping from the Earth's core. Those closest to the cracks in the ground where the foul mist escaped, turned into something else. Their skin became mottled browns and greens and with every lumbering step they sniff for human flesh. The only noises they make are inaudible songs that sound like groans and growls.Twenty years later it is just accepted that zombies roam the streets in packs of ten, and soon the blue moon will turn blood red. Two girls with different goals grow up in the brown mist that has stopped all cars, planes and computers from working. Ashling will do anything to be safe from the zombies that turned her father into an undead. Briana is searching for a cure to bring her sister Caoimhe back to the living. She must find the cure before the blue moon turns red and her sister eats and is lost forever. As they travel in search of answers they meet some of the most powerful and terrifying legendary characters of Ireland.