Food delivery rider Zhu Ying was swallowed and killed by a giant flood dragon. Reborn in an anomalous world, he transforms into a black dragon lurking in the abyss and awakens a devouring evolution system. By consuming flesh and blood and mutated beasts, he accumulates evolution points and grows stronger. His main mission is to protect the Yan Kingdom and maintain stability in the anomalous world; otherwise, countless anomalies will invade the real world. Foreign fleets watch menacingly from the seas, while zombies and demonic beasts run rampant across the land. Foreign forces plot to tame giant beasts to counterbalance the Yan Kingdom, and a global catastrophe is approaching. Only this black dragon, fed by 1.4 billion people, can hold the line defending the nation's borders.