Underclass youth Chen Mo was tricked into becoming a water monkey to gather medical fees for his mother. Near death, he awakened the Heavenly Eye superpower, which can see through the value and authenticity of all things. He was chosen by Bai family eldest miss Bai Ruoxi for a fake marriage, and since then became entangled in wealthy family struggles. Relying on his Heavenly Eye to expose conspiracies, win appraisal contests, and reveal the truth, Chen Mo counter-attacks from a humble water monkey into the Bai family chief appraiser, and even develops hidden romantic feelings with the female lead Bai Ruoxi through sharing life and death, joining hands to explore the ultimate secret of the lost city beneath the ocean.