In a world on the brink of chaos, a group of teenagers sets out on a perilous journey driven by dreams, friendship, and a deep sense of responsibility. Among them is Huzi, a cheerful mountain orphan who accidentally swallows the powerful Red Pearl—an artifact coveted by both humans and demons. This fateful event binds him to Qi Xiaoxuan, a cold and disciplined demon master with a touch of obsession for cleanliness.

Though opposites in every way, Huzi and Qi Xiaoxuan are forced to travel together, joined by new allies like Zhao Xintong and Wang Yuqian. Through trials and danger, their bonds deepen—especially when Qi Xiaoxuan is captured while protecting Huzi. Determined to rescue him, Huzi and his friends enter the national demon master selection, only to uncover a dark conspiracy that ties back to a devastating war between humans and demons 500 years ago.

As the sealed demon army begins to rise and the corrupted leader of the Demon Division seeks power over both realms, these brave teens must stand against overwhelming odds to protect the world—even if it means sacrificing everything.