The Returned 2019 one on netflix

Julia, wife of a wealthy lord living near the Iguazu Falls, has nightmares for several days. The lord builds a fence to ward off the indigenous people, the Guarani tribe, but Julia is still anxious about her son Manuel’s safety. One day Manuel suddenly disappears, and when searching for him, Julia runs into her maid, Kerana, who was believed to have died one year before, under the falls.