Xiao Huo, a graduate student in biology, unexpectedly reincarnates as a newborn black-bellied spider. From the very beginning, he faces hunger, deadly battles among his own kind, and the threat of being eaten by his mother. After awakening an Infinite Devouring Evolution System, he uses his intelligence to weave webs, hunt prey, and evolve through devouring. Along the way, he befriends Yuangun Gun, a timid and hilarious spider, and Bai Yu, a powerful spider. Together, the three spiders fight for survival, first in their nest and later against red fire ants, poisonous scorpions, and blood-tentacle ant generals, gradually uncovering the secrets of their mother's experiments, the ant queen's conspiracy, and the forest itself. Through one life-or-death evolution after another, Xiao Huo grows from a weak spiderling into a formidable force capable of reshaping the order of the insect world.