One midsummer year, a southwest mountain village. Just after her grandfather was buried, Yin Xiao scanned the courtyard alone and learned the truth about her adoption - she was just a tool for her adoptive parents to "bring forth children", and her childhood was immersed in her adoptive mother's unprovoked violence. The secrets her grandfather confided when he was dying became her last protection: the fortune teller's prophecies and her cousin's arrangements were all designed to prevent her from being bullied after she lost her support. As the sun set in the west, Yin Xiao, who was filled with sadness, fell down with her eyes darkened, and a pair of arms caught her steadily. That man came from thousands of miles away to fulfill his grandfather's entrustment before his death. Among the green mountains and white walls, he continued to express his unfinished worries for the old man...