In a distant future, the Death of Intelligence occured—a sudden and unpredicted  event of mass death where an unnamed, undetected and unstudied virus kills everything that possessed intelligence, or had the ability to become intelligent, in all biological and non-biological forms. One lucky android by the name of Amanita Kiddy, whose code was committed just as the event occurs, seems to be the only survivor... until she finds another one just like her, and begins the journey to discover the other last of her kind.