In 2018, Kashiwa City, Chiba Prefecture, Japan became known as Kashiwanoha Smart City. A family toured a model room of a tower apartment located on the Park City Kashiwanoha Campus The Gate Tower. They were impressed by the excellent facilities and decided to make this city their new home based on its environment. However, after they left, there was a sudden earthquake and a giant robot emerged from where their old apartment once stood. The family was shocked and confused about what was happening in this town. What secrets does Kashiwa City hold?