The roads beyond Blackridge are being measured for an invasion.
Cole Mercer has a county seat, three anchors, and a System deadline glowing red over everything he fought to save. Beyond his boundary, quarry crews are trapped, a relief train has nowhere safe to stop, and old contracts keep hurting people whose captor has already lost. The next enemy knows where every rescue has to pass.
Cole's Warden build can hold ground. It cannot be everywhere. To reach the people cut off from him, he needs a rail alliance whose operators keep their own switches, Mara Bell's talent for recovering what powerful men hide, and June's nose for the path an enemy forgot to watch.
Every new connection makes the settlement stronger. It also gives the Surveyors another weakness to mark. The numbers are rising, the map is learning, and Cole is going to have to make it wrong before its master arrives.