Locked away by her parents for 18 years, one young woman has never attended school. The skeletal remains of a boy deserted by his father were discovered, as nobody knew he had been left alone in his apartment. Such children are completely isolated from society, prevented from going to school by abuse or poverty, and the outside world has no idea where they are or what they are doing. NHK has tracked down some of these isolated children, and for the first time tells their story. This program examines the pleas of children in a hidden corner of modern-day Japan.