This photo documentary with text and music is based on an ethnographic study. It highlights the arrival of synthetic chemical pesticides in Cambodia and the multiple social and environmental changes they produce in their path. It illustrates how these tools of "agricultural modernisation" quickly became unavoidable and escaped control. Pesticides are supposed to be spread in a way that is strictly regulated. In practice, once they leave the factory, their socialised life is highly unpredictable, inseparable from the context in which they circulate; how they are used escapes efforts at standardisation. They therefore deviate from the path they set out on. This montage sheds light on the micro-social spaces where the health and environmental problems linked to pesticides are created.