"When the old man blows the bloody whistle among them, unexplained and terrifying events begin"

The Circle of Death 2

Orgil lives with his elderly father and two children. Their family lives peacefully, but his father suffers from Alzheimer's disease. Orgil gives his father wartime items, such as an overcoat, a whistle, and a painting, hoping that they will help him regain his sanity. When the old man blows the bloody whistle among them, unexplained and terrifying events begin in Orgil's life.