Urzelina is a half-hearted level crossing keeper. In the middle of the day, she drinks a cup with half milk, half coffee and eats half a toast. It is also in the middle, between the past and the present, that her days are spent in service of the railway line. One day, something different happens in her routine, which forces her to complete a task. It is this change that unlocks her movements, even though they are no longer necessary. Urzelina is trapped in what she no longer has.