Since Mrs. Blok suffers from dementia, she rarely leaves the house and spends most of her day watching the family happiness of her neighbors: Eva, her husband and their two teenage children lead a harmonious family life after moving into the house next door and Ms. Blok takes a big emotional part of it. Her health condition improves as a result. But because of her good powers of observation, she also noticed one day as the first fine signs that the family happiness is wavering. Mr Blok, who states that his wife is now doing much worse, then decides to intervene - with fatal consequences for both families.
