An Feiben, a top female student in the Department of Marine Geology, secretly has a crush on a young and promising scientist, Mo Liang, and hopes that one day she can become a top researcher and marine defender in the industry to be on par with her lover. Suddenly one day, a beautiful boy named Ye Hai who always brings her bad luck appears in her life, and everything is disrupted by him. Ye Hai not only opposes the marine energy experimental project that Mo Liang is in charge of, but also "lies" to An Fei that she was once his wife, and the two of them have a common responsibility to protect the ocean. The strange and conceited Ye Hai makes An Fei avoid him, but the development of the experimental project is far beyond An Fei's imagination, and its potential harm is just as Ye Hai said. At the same time, she also discovered that she did have a trace of emotional involvement with Ye Hai in the depths of her memory, and that Ye Hai has a powerful energy that tries to save the ocean before the crisis. The two eventually took on the responsibility of protecting the ocean like the legendary Poseidon and Amphitrite.