The body of a prostitute is found at Glasgow's Queen Street Station, her hands, pointing towards her feet, placed as if in prayer, a small flower pressed between the palms. Psychologist Solomon Brightman is called to assist DCI Lorimer in the murder hunt, with the hope that his lateral thinking will shine a light on the case from a different angle. But before any conclusions can be drawn, the body of a nurse is discovered at The Grange, a private clinic. Aside from the careful arrangement of the corpses, there is no obvious connection between the victims; Lorimer and Solomon are still very much in the dark. Then a third body turns up, and it seems increasingly clear that they have a serial killer on their hands.