Newlyweds Kyle and Mandy arrive in the quiet town of Esperville, Oregon, ready to build and sell homes, imagining a bright future together. But Esperville hides a dark secret: the land itself seems to swallow its residents whole. Vanished without a trace. At first, Kyle dismisses the town's disturbing history as local superstition—until a close friend is savagely attacked by a nightmarish creature, and Mandy disappears that same night.

Desperate to find her, Kyle teams up with Sam Oswell, a grieving potter haunted by the mysterious disappearance of his own son. Together, they uncover a doorway to "the Alt"—an eerie, alternate dimension where a breaking time loop traps its inhabitants in a twisted version of 1950s Las Vegas, replete with creatures, monsters, and evolving lifeforms. This world teems with strange life forms, and reality itself is breaking down.

Worse, it is a two-way door, and Kyle soon realizes that the reality of the Alt has already bled into small and quaint Esperville with deadly results.

To rescue Mandy, Kyle must face mind-bending dangers in both dimensions, confronting a ruthless army officer intent on preserving the Alt's deadly cycle. Time is running out, and as the boundaries between worlds crumble, Kyle must risk everything—not only his life, but the fragile balance of reality itself.