The world beneath Appalachia may hold a way to slow the outbreak. That does not make it humanity's to take.

Rachel Devlin and the survivors have crossed into a hidden country with its own people, medicine, laws, borders, and memories of dangerous encounters with surface humans.

As researchers uncover a biological relationship that may interrupt the infection before full conversion, rumors of an underground cure begin spreading above.

There is no cure.

There is only an experimental treatment, a fragile alliance, and millions of desperate people searching for hope.

Meanwhile, the infected are changing. Their behavior is becoming more coordinated, the deep Pulse is returning, and breaches between the two human worlds threaten both civilizations.

Rachel must help build a system that can save lives without turning another population's bodies, territory, and knowledge into resources to be claimed.

Break the Bridge concludes The Hollow Breach, a survival-horror and speculative-science-fiction story about outbreak, consent, adaptation, rebuilding, and who owns the answers when everyone needs them.