Four hundred years after the collapse of society, human survivors are living in a retrofuturistic utopia deep beneath the surface of the earth. Generations underneath artificial skies, eating artificial food and smelling artificial flowers, this society of scientists has settled into improving the quality of their artificial life rather than finding ways back under a real, warming sun.Enter Alexandyr Hall, a biological engineer currently working on a fruit that changes flavor over voice command. He is the first in centuries to question the security of his city, the actual value of his life, and the future he would leave his two year old son. After a series of trials and errors he discovers something so impossible, it might be the only way to save the human race and, ultimately, all life.