Silent immobility reigns when the machines come to a halt in the immense fields of monocultural soybean plantations. Helena (6) lives with her parents, who work on a large soy farm in southern Brazil. She is afflicted with sleepwalking and ever since her mother was diagnosed with cancer she has been visiting a Guarani Indian woman called Bugra by the white farmhands. A sense of identification allied to the mutual solitude creates a strong bond between them. Helena spends hours listening to stories about the invisible beings in the sparse woods that still flourish in the region. When an unknown and pesticide-resistant plant begins to sprout, threatening the crops, workers wonder where it has come from. But none of their speculations correspond to what Helena sees in her late-night walks.