Zhang Jianan, a highly educated talent, uses his cutting-edge fishing expertise to help his second uncle, Zhang Dahai, and his fleet earn nearly seven million. But instead of receiving his share, he is betrayed: his uncle tears up their agreement and forces him to sign a ten-year contract of servitude, while repeatedly attempting to kill him and his seriously ill father. Driven to the brink, Zhang Jianan carefully plots his moves, using his exceptional skills and meticulous strategy to turn the tables on his enemies. As he uncovers the truth behind the blood feud surrounding his father's murder, he ultimately becomes the true master of the fishing port.