In the future city of New Ark, where memories are periodically erased, top memory restorer Ling Su touches a buried, forbidden truth while repairing a mysterious girl named Aila's “abnormal memory.” The fragment points not only to a forgotten world beyond the city, but also to his younger sister, who disappeared many years ago. To find his sister and reclaim the life stolen from him, Ling Su joins forces with Aila and embarks on a dangerous journey to fight the vast System and awaken a sleeping world.
