The eighties pass in a remote, wealthy, conservative and religious community that surrounds a hydroelectric plant. A family – made up of three young brothers, a father and a mother – has grown apart for unknown reasons. The death of the father will bring them together again in an old lake house to give him a sacred burial. But this is just the beginning of a family tragedy that will lead them to discover and decipher dark puzzles of their lineage as well as terrifying and ancestral truths of the community. Something is hidden under the waters of the lake, and it is the reason why the community has been built next to it.