Three connected horror stories from three different eras. In 1990s rural China, a young woman named Song Anna goes searching for a reportedly inescapable abandoned village on the Shengsi Islands — and finds herself inside it. On Halloween in the 2010s United States, two college students give rides to their little sister's friends, take a wrong turn, and end up somewhere that should not exist. In the 2030s, on a floating city built for climate refugees, two plant maintenance workers and their polycule investigate a sudden power outage — and discover something far worse than a malfunction.