Cultural relic restorer Shen Zhi marries technology tycoon Zhou Yan because of her eyes that resemble those of a Dunhuang god. After three years of marriage, she was just a stand-in in his eyes. It wasn't until she was seriously injured to protect the ancient books and handed over the divorce agreement that the truth was revealed: she always loved the faith on the mural. When Zhou Yan's world collapsed and he began to clumsily learn to love, they discovered a new mural together, revealing an even more shocking secret: Zhou Yan's appearance was actually similar to that of an infatuated donor who spent all his wealth to protect the cave thousands of years ago. This love has fallen into the puzzle of "double substitutes". He must go beyond the superficial and prove his unique love.
