When Holly is involved in a road crash, she crawls from the wreckage and is violently assaulted by the driver of the other vehicle. Before Holly blacks out, she sees tourists recording the event, prompting Holly to attack the crowd herself. Waking from months in a coma, she finds out that the clip of her attacking the onlookers has gone viral. Holly can't bring herself to watch, until she realises they're the only key to understanding what happened. But the people who recorded her misery are being methodically murdered, and Holly.