In the ashes of a world shattered by a catastrophic gamma-ray burst, survival is a brutal test of will, morality, and endurance. Society has crumbled into factions of the desperate and the damned, with fortified Settlements and roving bands like the Ravagers carving bloody paths through the remnants of humanity.

Gaffigan, a grizzled loner with a past he's desperate to forget, wants nothing more than to stay out of the fray. But when he stumbles upon a wayward child in the lawless wilderness, he's dragged into a journey that could either doom or redeem what remains of humanity.

Andrew Joseph, a disillusioned scientist, works under immense pressure to develop technology that might cleanse the Earth's irradiated surface. But as he teeters on the edge of discovery, he finds himself ensnared in a dangerous web of power, greed, and sacrifice.

As their stories collide in a stark, unforgiving landscape, Gamma delivers relentless action, haunting twists, and a brutal exploration of humanity's resilience and its darkest instincts. This is survival stripped to its rawest form, where every choice reshapes the fate of a fractured world.