After resigning, Lin Xia inherits the run-down seaside aquarium left by her grandfather. The entire venue is desolate and barren, yet there is a completely pink dolphin named Pipi, who says it comes from the legendary Atlantis. In order to chase after Pipi, Lin Xia accidentally jumps into the pool and surprisingly discovers a secret door at the bottom of the water tank leading to the lost ancient undersea city. At that time, Atlantis is deeply mired in famine, and the commoners of the sea clan are all sallow and emaciated. Lin Xia, who is endowed with the power of Shennong, plants celestial peaches to solve the food and clothing needs of the entire clan. The sea clan royalty repays her with a large amount of deep-sea treasures; she renovates the venue, introduces rare sea creatures such as colorful eels and oarfish for exhibition, and the old aquarium becomes an overnight viral sensation.