Genius beast tamer Ye Xun draws an F-rank dirt chicken at the start, mocked by everyone, only for it to unexpectedly be the fallen undying divine empress Feng Yan, while the devouring evolution system is activated at the same time. Betrayed by his sister and oppressed in every way by the wealthy family Li Bo, the two devour fierce beasts and spiritual materials all the way to evolve rapidly. A world-destroying beast tide is approaching, otherworldly spiritual energy leaks continuously, and crisis is imminent. At the border defense line, Ye Xun takes Feng Yan, who has evolved into a heaven-burning swan, to meet strong enemies head-on, tearing apart the conspiracy beneath the beast tide and guarding the human city.