Rachel Watson, devastated by her recent divorce, spends her daily commute fantasizing about the seemingly perfect couple who live in a house that her train passes every day, until one morning she sees something shocking happen there and becomes entangled in the mystery that unfolds.
Relentlessly grim yet unengaging, despite a committed performance from Emily Blunt at the centre of it.
Fractured narrative can work brilliantly when a master like Christopher Nolan is in charge. This just felt like a boilerplate chick-lit murder mystery thrown into a blender to hide the thinness of its story.
ColinJ was right, there's nothing I would add.