The Battle Era: Record of the Myriad Races System follows Yun Ye, a human youth who witnesses the beastmen massacre at Wangshuo Pass on the Northern Frontier. After his master sacrifices himself, Yun Ye unexpectedly activates the Myriad Races Battle System. Using the System, he slays beastmen, protects his junior fellow apprentice Huzi, and gains cultivation and martial arts techniques. Later, in a secret passage, he unlocks the human talent for “broad knowledge and a powerful memory,” allowing him to learn martial arts faster. In the forest, he is attacked by a black-striped bear at the seventh level of the Body Tempering Realm. Relying on the System and his own courage, he faces a world full of danger, protecting his companions, resisting foreign races, and seeking hope for humanity’s survival. His story reveals humanity’s struggle and resistance amid the war among the myriad races.