After a scientific breakthrough in which animal and human souls swapped bodies, the world is left in virtual desolation. Humans are left to deal with the Cor and Dai, the Mutations. Humans are forced into hiding. The Dai and the Cor tribes are ripping apart each other and the world around them. Cailee is turning seventeen, and it's time for her to leave her safe haven. Along with a group of Pursuers, she must forage ahead for supplies to bring back into her cavern. With the help of her friends and those she meets along the way, Cailee will discover things previously unknown of.