The Taoyuan sworn brotherhood was supposed to be Liu, Guan, and Zhang, but instead there was a 20-year-old boy named Xiao Yueyue. Liu Bei regarded him as a brother, Guan Yu respected him as a brother, and Zhang Fei treated him as a close relative. But none of them knew that this fourth brother was a time traveler, holding future history in his hands and carrying a mysterious system. When Xiao Yueyue tried to survive in troubled times, he found that he had already been trapped in the whirlpool of fate - it turned out that his existence was a shocking change that overturned the Three Kingdoms.
