Su Wan, an ancient book restorer living an ordinary life in a modern city, accidentally discovered a bronze talisman engraved with a strange star map in a mutilated Tang Dynasty manuscript. The moment she touched the talisman, she felt a strong sense of dizziness. When she opened her eyes again, she was already on Zhuque Street in Chang'an, the prosperous Tang Dynasty. In distant Chang'an, Lang Chenyan, a young man who had just experienced a palace coup and was forced to go into exile, fell into a forgotten ancient altar during his escape. When he woke up from a coma, he found that he was surrounded by a steel jungle and brilliant lights that he had never seen before - this is a modern city thousands of years later.
