Jiang Xiaoyu takes the place of her older sister Jiang Yujiao to marry Lin Dashan. The Lin family's boat bottom is already cracked, and a shark gives a warning. Jiang Xiaoyu stops the boat from sailing and relies on her skill of listening to the sea to dodge reefs. Liu Shoucai presses for debts, pours toxic water, makes fake medicine, and steals the golden seahorse. Jiang Xiaoyu and Lin Dashan brave Ghost Tooth Reef and Triple Gate to find the golden seahorse. At the Sea Medicine King Convention, Jiang Xiaoyu exposes Liu Shoucai's fake goods. Liu Shoucai escapes and encounters a typhoon, Lin Dashan saves Jiang Xiaoyu who falls into the water, and Jiang Xiaoyu listens to the sea to find her husband back. The Lin family finally wins the Sea Medicine King, pays off the debts, and Jiang Xiaoyu freely chooses to marry Lin Dashan.