An explosion erupts in the silo and Mother is critically injured. Who will venture up into the nuclear-active world above to find help?

What does the mysterious word "ALLIES" inscribed on Faye's body mean? Who are these ALLIES and where are they?

Adam and Beth try to escape from the clutches of the Colonel's men. Why are they bent on capturing them and who is the strange woman who helps them?

Can the children survive the final showdown with the Colonel? What prevails in this world when there are all lies?