Humans shrink to just a few centimeters tall, turning the world into a deadly forest. A college student named Mark awakens the Limitless Evolution System, gaining power by absorbing biomass and opponents' abilities. Together with Winter, a genius who keeps to herself, he faces mutant animals, cunning Awakened enemies, and evil cults. As the secrets of the Xeno-Core come to light, Mark must collect the scattered cores to survive and save humanity.