Chen Haisheng, a young man from an East‑China‑Sea fishing village, only gets a worn‑out boat and a mute girl Ajiu after the family split. He accidentally awakens a dragon‑shaped pendant that opens access to a mysterious ocean realm.Raking in huge profits with premium deep‑sea seafood and Ajiu’s supernatural powers, he is framed by his elder brother Chen Hailong and ruthless dock bully Zhao Debiao.Cornered, Ajiu reveals her true dragon identity. The pair obtain priceless treasures in the Dragon Palace secret land. Chen Haisheng launches his seafood brand, breaks the monopoly and leads the whole village of fishermen to prosperity.