A penniless young man, Zhao Yuan, guards his family's fish pond to save his ailing father—only to accidentally unlock the Dragon Clan Aquaculture System! The pond suppresses dragon powers, prompting dragon prince Long Yan and dragon princess Long Xue to transform into fish and seek refuge. Using the system's divine feed, Zhao Yuan breeds dragons, thwarts Hongtu Group's land-seizure conspiracy, cures the Four Seas Dragon Clan's hereditary plague—and launches a cross-dimensional aquaculture empire.