It's July 1917, and as the sun sets over No-man's-land so Joseph Reavley's heart sinks with it As chaplain he must keep up the men's morale, but as rumours of mutiny grow stronger he is losing any chance of getting through to them After the death of an officer, twelve soldiers are arrested, and it falls to Joseph to uncover the truth about their involvement Joseph's brother Matthew, of the SIS, is also in pursuit of the truth and as he embarks on an investigation, Matthew knows his own life is in danger but thinks it a small price to pay to secure the future of millions of people