Tasked with solving an impossible murder, detective John Finch searches for the truth among the war-weary ruins of the once-mighty city of Ambergris. Under the six-year rule of its inhuman gray cap masters, Ambergris is slowly crumbling into anarchy. The remnants of a rebel force are dispersed, their leader, the mysterious Lady in Blue, missing. Citizens are being interned in camps. Collaborators roam the streets keeping brutal order. But Finch also has to contend with new forces rising, like the enigmatic spymaster Ethan Bliss, and the contamination of his partner, Wyte, who is literally disintegrating under the strain.