In the remote jungles of South America, a group of explorers embarks on a dangerous mission in search of a legendary river said to hold an ancestral secret. The adventure begins when an anthropologist joins a team of hikers, determined to uncover the truth behind mysterious ancient disappearances plaguing the region. However, what started as a journey of curiosity soon turns into a struggle for survival.
As they venture deeper into the jungle, the team members face not only the dangers of nature but also an indigenous tribe that protects its territory and an enigma filled with superstitions that seems to come to life with every step. As tensions rise and distrust takes hold of the group, a dark secret begins to emerge: the river is not just a watercourse but a manifestation of a supernatural force that manifests in the thirst for revenge of those who have been betrayed.
With an oppressive atmosphere and a charged sense of tension, each of the explorers confronts their own demons and moral decisions, transforming the expedition into a journey into the unknown. In the end, they will not only have to fight against the jungle and its inhabitants but also with their own humanity as the line between good and evil becomes increasingly blurred. Will they manage to escape alive, or will they become just another part of the legend?