Impoverished college student Ying Shaolong accidentally saves someone and falls into the water, coincidentally awakening the peerless technique Ancestral Dragon Art. Since then, he unlocks the divine dragon transformation ability, able to transform into a divine dragon roaming the four seas. Traversing the deep sea, he wantonly fishes for rare seafood, with large yellow croakers, abalones, and bluefin tunas easily obtainable. He can even communicate with and enlighten aquatic creatures, subduing shrimp soldiers and crab generals, commanding deep-sea giant sharks, giant octopuses, and ancient sea beasts to bow and follow, holding the hegemony of the entire ocean. Shedding his deep-sea Dragon King identity, he returns to the urban campus, starting a wantonly unrestrained and invincible life.