Ixquic, an Indigenous teenager from Guatemala, grows up listening to her mother’s stories about ancestral Mayan beings and the fireflies that once lit the nights of their land. While her mother fights to defend their river from a hydroelectric company threatening their community, Ixquic rejects these stories and believes in the promises of modern progress. But one night, the river turns to blood, and serpents appear in the darkness. Confronted with an ancestral force she cannot escape, Ixquic must face the darkness within her and decide whether to deny her origins or embrace the fire of her identity.