A childhood sweetheart who was separated by the selfishness of his parents, reunited after seven years in the snow. Shen Zhiyi and Lu Zeyan once made a vow of eternal alliance under the locust tree, but their youth was abruptly cut short because of a carefully crafted lie. When the truth was like a sharp knife cutting open the scars of time, he was in the advanced stage of gastric cancer, and she was also burdened with seven years of guilt. The red post is dazzling, the sickbed is murmuring, and the belated letter is ultimately not worth the separation between life and death. The snow fell in the lonely city, and the snow fell silently. They used an obsession that spanned Yin and Yang to write down the most painful miss and regret in love.