The trains of suburban Zurich define a way of life, so ordered, predictable, efficient. For an ex-pat who marries a Swiss, the implicit demand to conform is a massive psychological ask. Failure to do so carries the seeds of personality disintegration. Anna’s sexual neediness is clearly a pathological reaction to 'boredom'- a self-put-down that cannot hide the descending spiral. A tense read – Anna’s self- destruct button is always flashing.