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In a big city, all offensive weapons suddenly became ineffective. The entire city was enveloped by a magical energy, and human fighting regressed to the age of cold weapons.

Modern young people accidentally traveled to a parallel time and space in the Three Kingdoms era, and became brothers with different surnames like Liu Bei, Zhang Fei, and Guan Yu. With his understanding of history and modern thinking, the protagonist assists the three in developing their power and recruiting talents, and ultimately defeats Cao Cao and Sun Quan, completing the great cause of unifying China.

The male protagonist has just graduated from college and joined a foreign company. He originally lived a normal life from 9 to 5, occasionally working overtime. Unexpectedly, suicide cases occurred continuously in the factory, and he often encountered some strange and supernatural things. So he tangled up with a few idle old friends, pretending to investigate, but who knew he couldn't stop it and put his life in danger.