Where does the machine end and humanity begin? 2080 AD Tokyo, Japan. The Amada Corporation break Geneva Code, Clause 21 by creating humanoid robots that believe themselves to be human. These so-called Hollow Children have infiltrated the human population, blurring the lines between man and machine. Dan Marshall and the Rust Crew are tasked to find Amada at all costs. Will the team's human bond be their greatest strength or will they fall to the machines?