Yet another edit. Thanks to Nonicks and Rykter. Most of your comments were taken under advisory. Let me know what you think!
Fourteen-year-old Kal, resident jokester at the local temple where he was abandoned as a baby, longs to find his original incarnation's name. Only then can he prove he's not just another Reborn with no past but a bona fide god reincarnated. On the other hand, in her airship above the city, fourteen-year-old Nia doesn't care about her past incarnations. She only wants to find her older brother, lost after their parents' murder ten years ago.
Faced with the prospect of becoming a permanent member of the temple, Kal steals Nia’s airship. If he can escape his fate and find a Patron—someone with a proven pedigree as a previous god—he may finally be able to find the name of his original incarnation. But without her airship, Nia is stranded when Union forces attack and begin abducting teenagers.
After Kal crashes the airship and is kicked out of the temple, he receives help from an unlikely source. His mentor, one of the monks, believes Kal’s declarations of being a god reincarnated may not be simple boasting. After observing his abundance of Flame—the magic all Reborn possess, but few can access—the monk agrees to introduce Kal to a Patron. In return, Kal must rescue Nia, who is now trapped in a Union prison, the House of Ashes.
Kal meets a rambunctious Patron and learns to control his Flame. Meanwhile, across the desert, Nia’s Flame is sucked out and weaponized by the Humbaba. This weapon is the true purpose behind the House of Ashes and the reason for all of the abductions.
When the weapon’s inventor visits the House of Ashes, Nia recognizes her long-lost brother. In a secret meeting with him, Nia learns he was tricked into inventing the Humbaba for the Union. They plan an escape, but Nia’s brother is found out and executed for his treachery. Nia is saved by Kal and the monk—but in their fight to escape, the monk is killed.
Devastated by his death, Kal puts his training with the Patron on hold to join the Brotherhood, a group of rebels. Nia also joins, hoping to avenge her brother. With her knowledge of the Humbaba, the Brotherhood plan a pre-emptive attack.
Their plan goes perfectly until Kal is trapped inside the Humbaba. As his Flame is sucked out, at the last moment he manages to overload the machine with his abundance of Flame. Nia swoops down in her airship, launching a surprise attack and finishing the battle.
With the weapon destroyed, the Brotherhood celebrates their victory. The destruction of the Humbaba, her brother’s creation, brings Nia some peace of mind. After Kal’s display in the battle, the Patron is also convinced of his lineage. Though the Union lost this battle, the war rages on. Together, Kal and Nia will continue fighting alongside the Brotherhood.