25-Year-old Mo Hai was once a feared Shura in the world. He spent three years in death row to abide by his master's will. Because his master owed the Qin family 10 trillion in gambling debts, he used his identity as a bodyguard and fiancé to protect Qin Lan, the president of Fenghua Group who was being hunted for developing longevity medicine. With his powerful strength, he saved Qin Lan from danger several times, and the two gradually fell in love. In the process, Mo Hai also uncovered the Black Dragon King, the mastermind behind the death of his master, avenged his master, and finally protected Qin Lan and the results of the research and development of the longevity medicine.