This audiobook is narrated by an AI Voice. He fights. She bleeds.

In the brutalist concrete city of Sensoria, empathy has been genetically bred out of the population to create efficient, unfeeling soldiers. The elite trade in 'Sensory Vials'—bottled emotions extracted from the lower caste—while the weak are discarded.

Vea is a Mirror. A rare genetic anomaly suffering from extreme Mirror-Touch Synesthesia, she doesn't just see pain; she feels it. If a bone snaps across the room, a phantom fracture splinters through her own limb. To survive, she works as a covert medic, living behind blindfolds to shield herself from the agony of the world.

Kaelo is a Null. The Empire's deadliest gladiator, he was born with CIPA—Congenital Insensitivity to Pain. He can walk through fire, shatter his knuckles, and fight until his body fails, all without feeling a single sting. He is cold, scarred, and desperate to feel something, even if it is his own destruction.

The dynamic changes when Vea is assigned as Kaelo's 'External Nerve.' Forced to watch his brutal matches from the sidelines, she becomes his biological tether. Since he cannot feel when he is dying, she must signal his limits.

But the link is a two-way street. As Kaelo becomes obsessed with the woman who carries his physical burden, Vea discovers a terrifying truth: she isn't just feeling his pain. She is the only one who can grant him pleasure.

In a city of the numb, feeling is the most dangerous weapon of all.