To fool the parents of the victims, the children were taken away on "school trips" and their parents were later told the x-rays were a treatment for the scourge of scalpal ringworm. 6,000 of the children died shortly after their doses were given, while many of the rest developed cancers that killed thousands over time and are still killing them now. While living, the victims suffered from disorders such as epilepsy, amnesia, Alzheimer's disease, chronic headaches and psychosis.
That is the subject of the documentary in cold terms. It is another matter to see the victims on the screen.