While on holiday, nine close friends discover a long-hidden, archaic board game in a stately Victorian home on a remote island in Maine. By playing the game, they unleash an ancient evil that brings out the worst in each of them. Rage, jealousy, greed, hatred, and lust boil over and, over the course of one terrifying night, the friends start to turn on each other in a deadly way. "The Black Waters of Echo's Pond" is a supernatural horror film that explores what happens when we face our darkest secrets.