In a bustling metropolis, archaeologist Lin Yu and his assistant Su Yao are focused on excavating Sanxingdui. During one dig, a bronze fragment engraved with mysterious symbols breaks the calm. The two study it but make no headway. A sudden thunderstorm engulfs the site in bronze-colored light, and they are pulled into a rift in time and space, arriving in the ancient Shu Kingdom.
The ancient Shu Kingdom is dazzlingly splendid yet fraught with unrest. A bronze sacred tree holds secrets, golden masks gleam during rituals, powerful ministers plot a coup, and war threatens to erupt at the border. Lin Yu's expertise marks him as a "visitor from beyond the heavens," and High Priest Baiguan shelters him. Su Yao befriends the Shu princess Cancong and discovers that the kingdom's secrets are connected to the bronze fragment.
Lin Yu and Princess Cancong fall for each other, but their unequal status, the complex political situation, and mysterious forces stand in the way of their love. As Su Yao investigates, she discovers that mysterious symbols linked to the bronze fragment keep appearing. Rumor has it that the golden mask can transport people through time and space and is coveted by others. She also realizes that someone is watching her in secret.
It turns out their transmigration was an accident caused by a time-space experiment, and a mysterious force is trying to use them to find the golden mask and control time and space. Lin Yu and Princess Cancong grow closer amid their troubles, but they do not forget their mission. Together with Su Yao, they unravel the mystery and expose the mastermind.
Su Yao is torn between love and friendship, while Lin Yu painfully struggles between two women. After a series of perilous adventures, they draw closer to the truth: the golden mask is a sacred ritual artifact, and its power to transport people through time and space has attracted the attention of evil forces, who use it to trigger transmigration.
In the final battle, Lin Yu, Su Yao, and Princess Cancong join forces against their enemies. At the moment of truth, Lin Yu decides to activate the golden mask's power to stop the conspiracy, even though he may be trapped in ancient Shu forever. The ending is suspenseful and moving,
