In 2026, the fog from the Wudu River spread across the bluestone road and entangled itself in the window lattice of the small rental house. Twenty-one-year-old Ma Lin was sitting on a faded wooden chair. His fingertips ran across the notes of "Zhang Yue" on his phone, and he typed out only an ordinary greeting. When the screen dimmed, the string of numbers 4163970915, which had been engraved for sixteen years, was still burning in his heart - this was the first QQ number that Zhang Yue, his childhood neighbor sister, applied for for him. The last number was her birthday, and it was also his only thought across the years.
From the ignorant first acquaintance in the old alley of Qingyu County, to the desperate escape amidst the flash of swords and shadows in southern Guangdong, to the ups and downs of acting training in Ning'an City, Zhejiang Province, Ma Lin's life has been turned upside down several times. He was comforted by Zhang Mo's tenderness in a foggy barber shop, but he only regarded her as his biological sister; he protected Zhang Xin, who was attracted to her, in the southern Guangdong club, but finally declined as "like a childhood sister"; when he was twenty years old, he and Lao Gui jointly founded "Yulan E-Sports" and accumulated a net worth of millions, but was betrayed by the person he trusted the most. He fell to zero overnight and fell into despair again.
When he was eighteen years old, his QQ account, which carried all the worries of a young man, was lost due to an invalid mobile phone number. Ma Lin thought that he would miss Zhang Yue in this life. It wasn't until he was twenty-one years old that a WeChat message from a neighbor in his old alley brought him back in touch with the light of his childhood. Sixteen years later, the two met again. Ma Lin fell in love with her three times, but was rejected each time due to the gap between brother and sister, past trauma and reality.
Now, he is about to go to the Western Regions to work hard. All the cares and obsessions are hidden in the childhood friendship that was carefully maintained, and in the number that was lost and found, but is forever engraved in the bone marrow. This is a journey of waiting and restraint that spans half a lifetime, which the young man spends the rest of his life guarding...
