Alex embarks on a dangerous quest to prove himself to his new ally, during which a startling face from his past appears; at the same time, Claire enlists the help of an old friend to halt what she believes is a brewing revolt from the V1s; and Michael makes a sacrifice that will prevent him from ever being with his love.

Alex spearheads a plan to intercept Michael and Gabriel, who have breached the walls of New Delphi in pursuit of their mutual target; Claire begins the negotiation process with the revolting V1s; at the same time, David attempts to restore his legacy by any means necessary.