Jiachen accidentally fell into the tomb during an excavation of an ancient tomb. When he opened his eyes again, he was trapped in a thousand-year-old coffin. Next to him lay Xinbei, who was also awake and dressed in ancient costume. The two knew nothing. Only the strange lines on the coffin and the faint candlelight in the tomb showed that they had traveled to unknown ancient times. In order to survive, Jiachen relied on modern archaeological knowledge to identify traps and solve puzzles, while Xinbei resolved several crises with wisdom and agility. The two went from being strangers and being on guard to walking side by side. The secrets deep in the ancient tomb, the undercurrent of dynasty changes, and the unknown mystery of their life experience gradually emerged as they escaped from the ancient tomb. A time-travel adventure that started in a coffin, a bond that spans time and space. Can they stand firm in troubled times and uncover the truth about ancient tombs and time-travel?