After his augmented reality gaming headset is possessed by the spirit of the First Emperor of China, twelve-year-old Chinese American Zack Ying is compelled to travel across China to steal an ancient artifact, fight figures from Chinese history and myth, and seal a portal to prevent malicious spirits from destroying the human realm.

July Chen sees ghosts. But her dad insists ghosts aren't real. So she pretends they don't exist. Which is incredibly difficult now as it's Hungry Ghost month, when the Gates of the Underworld open and dangerous ghosts run amok in the living world. When July saves a boy ghost from being devoured by a Hungry Ghost, he becomes her first ever friend. Except William is a wandering soul wavering between life and death. As the new friends embark on an adventure...