After the war in the Parish, Adam is looking forward to a period of peace, but his superiors have other ideas. There are rumours from Oxford and the Cotswolds that Father John—who once almost overthrew Plymouth—is building an army, and someone has to go and investigate. Arriving in Oxford, Adam is surprised to find a thriving city with a healthy populace and technology not seen since before the fall of The Sisters. He also finds it patrolled by the descendants of the Thames Valley Police, among them Detective Inspector Leonie Mellow. However, it doesn't take long for dark events to concern Adam. Murders, paintsplashed graffiti on walls, people going missing—and he can't help but wonder if the past is following him.