At the end of the Warring States Period, Mo Heng, a top Yanshi master, was trying to build the "Tiantian Divine Machine" to protect his family and country. He accidentally triggered a rift in time and space, and the unfinished secret records of the organization fell into the future a thousand years ago. When he opened his eyes, his mysterious clothes were stained with war dust and frost, and he landed in the restoration room of the city museum - he bumped into researcher Su Qingyi who was frowning at the bronze mechanism box he made.
She is the youngest cultural relic restorer in the modern academic world. She is accustomed to the alienation of the steel forest and the open and secret attacks in the workplace, but all defenses are broken by this "intruder" with his own ancient charm and lost skills. Mo Heng understands the texture of wood and stone that lasts for thousands of years, and can repair broken mechanisms with hair-thick copper wire, but does not understand why electric lights "brighten daytime" or why mobile phones "transmit sound"; he adheres to ancient etiquette and obsession, but silently warms the milk when Su Qingyi stays up late to draw, and uses ancient techniques to prove her expertise when she is questioned.
Su Qingyi taught him how to read traffic lights, use navigation, and showed him the modern lights; Mo Heng used thousands of years of ingenuity to repair her closed heart due to the trauma of her original family and workplace, and even used lost mechanical skills to help her solve the problem of repairing the museum's "treasure."
But the marks of the rift in time and space are gradually fading on Mo Heng. He often returns to his war-torn homeland in his dreams, thinking of his unfinished mission and the teachers and friends who are waiting for him. On one side is the hometown and obsession that haunts the soul, and on the other is a close friend and tenderness that is rare in this life - Mo Heng stands at the crossroads of time and space, not knowing where to go.
And Su Qingyi also faced a choice: let him go and return to his own era, or risk everything to keep this man who spanned thousands of years just for the sake of it.
