The Paraguayan War (1864-1870) was the deadliest conflict in South American history. This film depicts the brutal struggle between Paraguay, led by dictator Francisco Solano López, and the Triple Alliance of Brazil, Argentina, and Uruguay. It explores the political machinations, devastating battles, and immense human cost of a war that reshaped the continent.

Leo is a young ranch hand who has never left his small community, located in southern Brazil, until he is faced with the need to fulfill his father's last wish. He travels to Rio de Janeiro with his uncle Arthur who he isn't very close to. During the trip, Leo manages to see the immensity of the world and the infinite possibilities, turning his trip into a great journey of discovery and transformation.