An unexpected attack on Gabriel's Aerie puts a newly-freed Alex and Noma on the road to New Delphi, a dangerous and mysterious city. Gabriel is close behind. Meanwhile, Claire begins to understand the breadth of her responsibility as Lady of the City as we reveal it was her strategic command that left The Aerie in ruins. Michael stumbles upon a quaint southern town whose residents have inexplicably managed to insulate themselves from the fallout of The Extermination War, hinting at a mystery Michael is driven to solve.

With Gabriel hot on their trail, Alex and Noma desperately search New Delphi for an ally, puzzled by the one they find. Meanwhile, Claire befriends her would-be assassin, Zoe, only to discover a seething truth regarding the V1's she's long forsaken. Concurrently, Michael struggles to maintain his secret as the town prepares for a sacred ritual to demonstrate their unwavering faith.

Alex embarks on a dangerous quest to prove himself to their newest ally, subsequently reuniting him with a startling face from the past. Meanwhile, Claire enlists the help of an old friend to halt what she believes is a brewing revolt from the V1's. Finally, Michael makes a sacrifice that will spare the town from destruction as well as preserve his identity but will prevent him from ever being with his new love.

His welcome in New Delphi running thin, Alex takes a dangerous step in his hunt for Gabriel as he, Noma and Riesen uncover the truth behind Julian's origin. Claire and Gates got toe-toe with a tenacious assassin as David attempts an alliance with the revolting V1's. Following a turbulent reunion, Michael and Gabriel strike a deal to extract Alex from New Delphi, his fate far from determined.

After discovering the truth behind Julian's army, Alex confronts an impossible decision as he 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 V1's as David attempts to restore his legacy by any means necessary. Finally, a familiar face returns to Vega just in time to see it change forever.

With time running short, Alex attempts a dangerous eviction in an effort to save Vega from impending attack as Michael plots their hopeful escape from New Delphi. Claire desperately navigates the fallout of Civil War as Gates Foley travels behind enemy lines to kill a broadcast that threatens peace in Vega. Finally, David procures his role in the rebellion following correspondence with an unsuspecting ally.

With the threat of the New Delphi army hot on their trail, Alex finds unexpected shelter in which to nurse a wounded Noma. Meanwhile, Michael and Gabriel attempt to escape their mutual captivity while revisiting a past that haunts them both. Lastly, Claire calls for a dangerous parlay as David puts a plan in motion to secure his legacy in Vega.

As Alex, Noma and Michael near Vega, Julian presses Riesen for the location of the amphora by digging up his past. Meanwhile, a military standoff ends in disaster, forcing Claire to make a harrowing decision as Lady of the City. Finally, an unexpected face wanders the broken streets of Vega, claiming to be The Chosen One.

As Alex, Noma and Michael hit an unexpected roadblock in their trek home, Claire makes a judgment call that threatens the security of a war-torn Vega. Meanwhile, Julian changes tactics in an attempt to break Gabriel while Arika and Gates wrestle with the cost of survival.

Michael gambles with his life as he faces the repercussions of his time in Mallory. Alex and Gates spearhead a mission to save Vega from destroying itself. David makes amends with his past as Gabriel unleashes an unspeakable evil on Vega.

The Darkness overtakes the citizens of Vega; William wrestles with the truth about his time in the desert; Arika becomes the victim of her own manipulations; Michael grows concerned about Noma; Alex searches for the Amphora.

With Vega smoldering from the havoc of the Amphora, Michael squares off with Gabriel in a fight to the death as Noma's mysterious past is explored. Meanwhile, Arika contemplates her escape while Claire joins the frontlines to protect her city. Finally, William makes a decision that seals the fate of Vega as Alex makes an irreversible attempt to save them all.

As the 8-Ball Army breaches the walls of Vega, David makes one final sacrifice to secure his survival. Gabriel forces Michael back to Mallory wherein they uncover a chilling surprise, while Noma's dark secret is revealed. Finally, Claire makes a desperate attempt at closure as Alex fights for control of the only home he has left.