It starts with the brutal and apparently motiveless murder of a civil servant in the car park outside the office where he works. A police investigation is launched, but another murder is carried out within a week of the first. The Journal is told in two parts. Firstly, from the eyes of a killer, who writes up his daily thoughts and actions in a journal that acts as his conscience, his own personal confessional booth. Secondly, from the eyes of the dedicated police officer leading the murder enquiry.