Langfang, about 40 kilometers from Beijing, is one of the most polluted cities in China. The city is laced with smoke and exhaust fumes. The local environmental protection bureau is caught between a rock and a hard place; it ought to clamp down on industrial polluters, but they ensure the livelihood for most of the inhabitants. The film confronts us with a burning question of global importance: how can we negotiate the conflict between economy and ecology?