The Eighth is the epic and painful story of teenagers, David Wells and Emma Adachi, who unlock a piece of ancient living armor and then, like all of us at that age, don't know how to control its power and end up killing someone. Before they know it, they find themselves on a terrifying journey to change or destroy the world, with no going back.
Math is the language David uses to command the living piece of armor to take different shapes. Numbers are his true super power. The armor once belonged to the 8th Sage of the Sumerian world. The other seven were responsible for the flood that cleansed the earth four thousand years ago. An event interested parties would like to see happen again.
David, Emma, and their childhood friend Atticus leave their hometown in ruins and scramble across the world searching for the missing pieces of the armor and themselves. In time, they realize they want different things and when they discover they're not only the harbingers of the end, but the ones with the power to stop it they're forced to turn on each other.