Everything has spiraled out of control . . .

The United States government is falling. Shepherd Prime is rising. Driven from their hometown, Zaley Mattazollo and her Sombra C infected friends have few options open to them. Unable to call home for help, with little food or money, they are trapped in a Shepherd net getting tighter by the day.

The nearest harbor for Sombra Cs is inaccessible, over fifty miles away through enemy territory. The only choice is to use an underground railroad of sympathizers to reach a more welcoming community closer by. But a Shepherd could lurk behind any friendly face, and if their luck runs out, their lives are over.