The village of Elmsly is shaken when university student Abi Marshall is found crushed beneath fallen scaffolding at a local construction firm. The company owner calls it a tragic accident, eager to shield his business from bad press - but Ellis is not convinced, especially as the camera that would have recorded the incident was switched off. They soon discover that Abi had been conducting an investigation of her own, into the building business itself. But what did she know - and why was it enough to get her killed?