In the quiet perfection of a suburban cul-de-sac, a mother watches from her window as a children's game of "Ring Around the Rosie" takes a chilling, synchronized turn. At the center stands a pale girl in a mint dress-a stranger who doesn't move, even as the others fall.

What begins as a mother's unsettling observation soon spirals into a nightmare of cryptic rituals. Her daughter, Chloe, begins hoarding jars of dried flowers to "hide her smell" from "the one in the middle," and a neighbors' sudden disappearance is met with an eerie, collective silence from the community.

As the lines between suburban safety and ancient horror blur, she must confront the "mechanism" that keeps her neighborhood perfect-and the monstrous price required to belong.