Fifty-year-old Georges works in an abattoir. One day, one of his colleagues has a heart attack. For Georges, it is an electroshock: he must take his life back in hand.

Thomas, Nora and their teenage daughter Ida live on remote marshland. Social contact is limited, as they only have one neighbour, Cristina, an Italian painter. As the two households plan a surprise birthday party for Nora, strange disturbances begin to occur and unease rolls over the marsh.