The Kawanabe Township, in Kagoshima Prefecture, had been throwing dioxin-contaminated ash in a valley behind the waste treatment facility for some 23 years. The town decided to dig up all the ash that had been dumped, to fully disclose information about their situation, and - in an effort shared by the local government and local residents-to re-evaluate their approach to environmental matters. The township's decision not to hide anything led to a convergence of people of the same mindset, people in Japan and abroad who then contributed their wisdom to an effort that culminated in the birth of an entirely new dehalogenation technology and all this in a town of only 15,000. Although this documentary looks at six years in the history of one small town in Japan, environmental problems have no borders.