One day before the Chilean National Referendum gives each voter the possibility to approve or reject the drafting of a New Constitution, Oscar and Marcelo, two brothers with opposite views, will share a trip along the desert coast of the country. Suspicious of Marcelo’s reckless involvement in the protests against the local coal plants, Oscar is constantly confronting his brother’s position as an environmentalist. On the way, the emotional complexity of their relationship will trigger a revelation that will end up influencing both their future and that of an entire nation.