A great wall separates a magnificent metropolis from the surrounding countryside. All humans are banned from ever entering the city. A young girl is determined to enter the forbidden city in search of her lost brother. When she crosses over, fantastic adventures ensue in narrow medieval streets, ancient temples, and abandoned bazaars of the haunted city. To save her missing brother, she must grapple with mythical creatures, explore the mystery of the missing inhabitants, and cure the amnesia of an entire civilization.