Billy Bizmo sends Spaz on a theft job to steal valuables from Ryter, a poor elderly man living in the stackboxes.

Ryter opens his door to Spaz, willing to surrender all his possessions except the manuscript he is writing.

Traveling home through the Maximall, Spaz encounters Lanaya, a young proov who hands him a bag of edibles.

Billy Bizmo discovers Spaz's edibles, warns him that mixing with proovs is forbidden, and recites his three rules.

A secret messenger arrives at Spaz's cube in the night to warn him that his foster sister Bean is dying.

Spaz asks Billy Bizmo for permission to cross the latches and visit Bean, but Billy flatly refuses.

Spaz sneaks out of the Crypts at night, and Ryter insists on joining him, with the trio using the Pipes to travel between latches.

The Monkey Boys capture Spaz, Ryter, and Little Face and drag them underground to Mongo's heavily guarded lair.

Spaz and Ryter discover that Mongo the Magnificent is near death, trapped looping in a mindprobe for over a year.

The trio finds Lanaya about to be swallowed by a mob in a burning latch and helps her escape in her takvee.

The group reaches Bean at Spaz's old family home and finds her gravely ill with leukemia, slipping into a coma.

Lanaya proposes taking Bean to Eden for treatment, and the group passes through the Barrier together.

Bean is injected with experimental gene therapy in Eden, and three days later she wakes up and begins to recover.

Lanaya argues before the seven Masters and thousands of proovs, but the crowd votes to send the normals back to the Urb.

The Bully Bangers drag Ryter to his death behind their jetbikes, and Spaz later begins voice-writing his own story.

Spaz, a teenage boy who cannot use mindprobes due to epilepsy, is sent by his latchboss Billy Bizmo to steal from Ryter, an elderly man writing the last book in the universe. After a chance encounter with Lanaya, a generous young proov, Spaz receives word that his foster sister Bean is dying of leukemia, but Billy refuses to let him leave the latch. Spaz defies Billy's orders and journeys through the dangerous latches of the Urb alongside Ryter and Little Face, ultimately rescuing Lanaya from a riotous mob along the way. Upon reaching Bean, Lanaya uses her special status to bring the group to Eden for a cure, and gene therapy successfully saves Bean's life. The group is then put on trial before the seven Masters of Eden, who uphold the law and vote to send the normals back to the Urb. Ryter is killed by a mob upon their return, but Spaz inherits his role as a writer and carries the story forward.

The core journey from Ryter's stackbox to the trial in Eden.

Little Face, a 5-year-old orphan in the stackboxes, agrees to guide Spaz to Ryter in exchange for a chocolate bar.

Back at his cube in the Crypts, Spaz watches old 3D hologram movies and finds himself unable to stop thinking about the word future.

Spaz returns to Ryter's stackbox intending to steal the manuscript, but seeing the old man's hope, cannot bring himself to take it.

Ryter asks Spaz to share his first memory, drawing out the story of how Charly banished him from his family unit.

A mob of stackbox dwellers surrounds Spaz at night and he collapses in a grand mal seizure, waking later at Ryter's home.

Ryter convinces the young tek Gorm to step up and lead Mongo's collapsing latch, envisioning him as The Great Gorm.

Gorm agrees to free all prisoners in the latch and escort the trio safely to the next border in exchange for his new title.

The group enters Traderville in Lotti's latch and poses as probe buyers to draw out the illegal probe runner.

Vida Bleek tells the group that all mindprobes and the equipment to use them originate from inside Eden.

Vandals swarm Vida Bleek's underground operation and the group flees through the fighting to escape the latch.

Lotti Getts gives the group safe passage out of her latch after defeating Vida Bleek and his Furies.

Crossing into Eden, Spaz and Ryter stand in the takvee hatch, overwhelmed by seeing blue sky and green grass for the first time.

Ryter tells Jin that probes are likely manufactured in Eden and sent into the Urb to erase normals' minds and destroy their society.

The Authority tells the group that old leukemia cures are lost but that gene therapy using improved blood cells may save Bean.

After Ryter's death, Billy Bizmo visits Spaz to explain why he gave him up, but Spaz rejects him and sends him away.

Before the main journey begins, the world of the Urb takes shape through small but significant moments: Little Face's role as a guide, Spaz's isolation in the Crypts, and his conflicted feelings about Ryter's precious manuscript. As Spaz sets out for Bean, a nighttime seizure deposits him back at Ryter's stackbox, and the old man insists on joining the mission. Navigating through Mongo's ruined latch, Ryter brokers a deal with the young tek Gorm, establishing him as a new leader in exchange for safe passage. In Lotti's latch, the group goes undercover at Traderville and discovers a major revelation when Vida Bleek confirms that Eden manufactures the probes destroying normals' minds. Once inside Eden, Ryter confronts Jin with the political reality of probe distribution, the Authority delivers its verdict on Bean's treatment options, and the aftermath of Ryter's death forces Spaz to fully sever his connection to Billy Bizmo.

The smaller moments and discoveries that shape Spaz's journey.

Ryter shows Spaz a handwritten manuscript and declares it the only book being written in the universe.

When Billy Bizmo asks about Ryter's belongings, Spaz conceals the existence of the manuscript, breaking Billy's rule about speaking true.

Ryter tells Spaz that many great historical thinkers were epileptic and argues that Spaz's condition is a blessing, not a curse.

Little Face is discovered to have secretly followed Spaz and Ryter through the Pipe, making himself known to them at dawn.

Lotti Getts intercepts the group and refuses them access to Bean unless they first expose and remove the probe runner in her latch.

Spaz realizes Lotti used the group as a decoy to draw out and destroy her rival Vida Bleek and his Furies.

The group arrives at Spaz's old family home and Bean wakes long enough to share childhood stories before slipping into a coma.

Lanaya's parents reveal she is a future Master of Eden, genetically designed for leadership with special privileges among proovs.

Bean learns chess and defeats Jin, one of Eden's top players, on her very first day of playing the game.

Bree announces she will adopt Little Face, and he responds by speaking his first full sentence aloud.

Enforcer proovs arrive at Lanaya's home in a skyvee and place the group in body-cuffs to stand trial before the Masters.

Thousands of proovs assembled at the Stadium silently walk away when asked whether the normals should be allowed to stay in Eden.

Proov enforcers deactivate all mindprobes in Billy's latch overnight, triggering a mob riot in the streets.

As the mob closes in on Ryter, Billy Bizmo arrives and reveals to Spaz that he is his biological father.

A runner delivers a message from Lanaya in Eden telling Spaz that Little Face is safe and the future belongs to them.

The turning points in this story begin with small choices — Spaz hiding Ryter's manuscript from Billy, Ryter reframing Spaz's epilepsy as a gift — that quietly reshape how Spaz sees himself and the world. Little Face's surprise appearance inside the Pipe, Lotti's manipulation of the group, and the discovery that they were expected by every latchboss hint that Spaz carries more significance than he realizes. The reunion with Bean ends in heartbreak when she slips into a coma, but Lanaya's determination opens the door to Eden, where Bean's intelligence stuns Jin at chess and Little Face finds a permanent home with Bree. The trial at the Stadium forces Lanaya to argue publicly for equality between normals and proovs, but the silent walkout of thousands signals how far that change remains. The final revelations — the overnight deactivation of all probes, Billy's confession that he is Spaz's father, Ryter's death, and Lanaya's hopeful message — close one chapter and open another as Spaz takes up the role of writer.