A team of biologists ventures into the northern jungles of Argentina in search of evidence that the Andean bear, the sole South American ursine species, can thrive in the region. During a visit to a local bar, they stumble upon an indigenous legend surrounding a mythical creature known as the Ucumar, believed to be a man-bear hybrid. As they delve deeper into the community, the townspeople share their gripping encounters and harrowing tales of encounters with this enigmatic beast.