In the 23rd year of the apocalypse, civilization collapsed into primitive ruins. {Lu Chen} was pushed off a cliff by his patriarchal family during a hunt. When he was about to die, he awakened the "primitive survival system", but his strict mentor {Wei Zheng} erased part of his memory in the name of "training" and threw him back into the dangerous jungle. With his remaining wit and basic system abilities, he struggled to survive among the cannibals and mutant beasts, and accidentally rescued the strange elf girl {Lin Xi} who was chased by the beasts. The two team up to search for resources, and Lu Chen discovers that upgrading the system requires solving the mystery of memory. Wei Zheng's "tempering" and the betrayal of his family are all related to the "red mist disaster" that destroyed civilization ten years ago. While using the system to exchange original tools to fight the crisis, he exposed his mentor's conspiracy and made the betrayers pay the price. In the primitive jungle of the apocalypse, he found a comeback road paved with wisdom and system.