The story starts because of one journey. Seven people who have never met before climb aboard the same ride that goes into a seemingly endless tunnel. Despite the countless trials, corpses that mysteriously appear, past acquaintances that returned from the dead and an unseen danger threatening to swallow them whole, it's as if they are trapped in an enclosed space where there is no escape.

At the end of the Eastern Han Dynasty, Liu Qi, the son of Zhongliang, guarded a crumbling pass in the middle of the desert and declared his place "refuge". Various forces gathered here to achieve a strange balance. One day, Geng Zhong, a general of the Han army, arrives and breaks the rules of the refuge, and from then on, Liu Qi is pushed by a series of events to make a series of choices about death, family, friendship, love, family and country.