In 1917, the small town of Sanchakou under the rule of Beiyang became an anchor point at the intersection of time and space. Chen Shen, a graduate student in the Department of Modern History, traveled here and became a museum security guard. He has a secret system that can deduce the next three days, but he just wants to survive in troubled times and use his treasure appraisal ability to quietly collect alien objects that fall from the cracks. He met Shen Qingyi, a cultural relic restorer whose life experience is a mystery, and the two established an underground trading network between warlords, cultivators and the mysterious "Space-Time Administration". However, when Shen Qingyi's memory began to overlap with that of himself in another time and space, and when Chen Shen discovered that his mentor had become an opponent in the world of cultivation, they were shocked to realize that the crack was not an accident, but a wound caused by a failed experiment of a certain civilization; and their encounter and existence itself was the only and cruel key to repair the scars in this time and space.
