Canudos was a small village in northeastern Brazil, founded by the messianic leader Antônio Conselheiro and massacred by a powerful army until the death of the last of its 30,000 inhabitants, on October 5, 1897. The film tells the story of the Canudos massacre from an English cannon, nicknamed by the backlands people "A Matadeira", which was transported by twenty teams of oxen through the backlands to fire a single shot.

In a town where it never stops raining, a boy who can't walk dreams of walking again. With the help of a woman who is also seeking healing, he will discover that, even in the midst of a storm, the most powerful force is born from love and hope.