Long Aotian, a wage worker who died suddenly from overwork in his previous life, is reborn as the legitimate son of a true dragon in the Celestial Realm. However, because he looks like a loach at birth, his biological parents cast him down to the mortal world, leaving him to fend for himself. By chance, he awakens a devouring evolution system that lets him unlock skills and evolve rapidly by consuming all things. Along the way, he encounters Ariel, the princess of Atlantis. The two go from bickering and disliking each other to falling deeply in love and staying together, eventually having an adorable daughter. When the demon clan invades and his own people mock and despise him, he stages an extraordinary comeback, defeats powerful enemies, saves the kingdom from danger, and storms the demon realm to rescue his beloved daughter. Ultimately, he transforms into a true golden dragon and breaks through the Nine Heavens with his wife and daughter, beginning a new life in the Upper Realm.