Since ancient times, the Boundless Continent has been the center of the myriad worlds. Countless races stand across the land, and for ages they and their realms have waged endless wars. One power after another has taken the stage, each enjoying its moment in the spotlight.
Ten thousand years ago, humanity rose to power. Sages emerged in great numbers, and humanity defeated the demon race, the previous rulers, becoming the new overlords of the continent and ushering in an age of human supremacy.
Three thousand years ago, human cultivators established the Heavenly Court to mediate conflicts among the various races. Those above the Heavenly Court were called immortals, and they were tasked with governing the myriad races, ushering history into yet another age.
Sun Yu, an unlucky fellow who transmigrated into the body of a dog, begins an extraordinary life of his own.