Katherine was born and raised in Sydney. After leaving school she worked in various jobs, including as an animal handler, and bookshop sales assistant, and went to university for a year to study science. Keen for something different she then joined the ambulance service, and spent the next fifteen years working on the road in various parts of NSW.
When paramedics Jane and Alex encounter a man refusing to get out of his crashed car with bystanders saying he deliberately drove into a pole, it looks like a cry for help. His claim that someone is out to get him adds to their thinking that he is delusional.
Later that day he is found dead under a train in what might be a suicide, but Jane is no longer so sure: she remembers the terror in his eyes.
Detective Ella Marconi shares Jane's doubts, which are only compounded when the case becomes increasingly tangled. The victim's boss tries to commit suicide when being questioned, a witness flees their attempt to interview her and a woman is beaten unconscious in front of Jane's house.
Ella is at a loss to know how all these clues add up and then a shocking turn of events puts even more people in danger...