Jiang Zhenhai, a beast controller in the apocalypse, is betrayed and killed, only to be reborn in the body of a notorious drunkard with the same name in the 1990s. He awakens the supernatural ability to control marine life. Determined to repay his debts, earn money, and make amends to his wife, Shen Qingyue, and daughter, Guoguo, he takes on tyrannical fishing bosses and unscrupulous merchants. He discovers that Qin Wanshan intends to use red waste liquid to bring about an apocalyptic blood rain and monopolize resources. Jiang Zhenhai joins forces with others to crush the conspiracy. The immediate crisis passes, but a giant beast in the deep sea opens its eyes, and a true age of evolution quietly begins.