Obsession (2010)

Hédi, a single 35 year old man, moves in to an old dilapidated flat. He discovers behind the wallpaper of the living room, four wooden planks nailed to the wall. Behind them, there's a big red button. Hédi then becomes obsessed by the button, and by what could happen if he pressed it. Little by little, he finds himself imprisoned by his obsession for the button, ceasing all activity, and cutting himself off from the outside world.