It is the year 3286, over a thousand years after a series of horrific events known only as the Calamity killed or mutated all life on Earth's surface. Arielle Stevensen has spent her entire life hidden away in the Underground, a series of disaster-proof bunkers designed to protect all that's left of humanity, and is forced to wait until her eighteenth birthday to marry her genetic match Kent Davis and carry on with her father's secret sinister plans. But when she finds a way out, discovers the world above, and forms an unusual friendship with a mutant shapeshifter, she finds herself transformed forever..