After having a mass shooting a police funeral, reclusive ex-cop Gannon finds himself unknowingly driven out of retirement when he realizes that the killer belongs to the exact militia he combined after quitting the force. Recognizing that the shooting could set off a chain reaction of violence his militiamen are quarantined by Gannon . There, he lays about a set of interrogations, intent on ferreting out the killer and turning him over to stop further bloodshed.