Liu Mohan, the Fishing King of the South Seas, returns to his hometown with superior crop seeds, only to be framed by his childhood friend Gu Chengze and his childhood sweetheart Su Rourou, who drug him unconscious and throw him into the sea. After drifting to a deserted island, he saves Madam Xu and her daughter. Using his skills in fishing, salt-making, finding water, and cultivating wasteland, he establishes a survival camp. Facing internal sabotage, revenge from his enemies, and attacks by a smuggling gang, he repeatedly overcomes deadly crises and grows close to Xu Qingyan, eventually falling in love with her. After being rescued, he rejects a prestigious position in a wealthy family and returns home to establish an ocean-going company, leading his fellow villagers to prosperity and completing his rise from a stranded fisherman to a dominant Fishing King.