What will the world look like after the last tree has vanished? How will we remember leaves and thorns, the shade above our heads, the shape of forests, and the lives that once dwelled within them? And in that future—will the air still be breathable? In 2063, with all forests gone and atmospheric oxygen nearly depleted, humanity stands on the brink of abandoning Earth. Seventy-five-year-old biologist Diana mentally returns to the year 2022, recalling Miguel, the last guardian of the Pampas forests.