Foster siblings Noel, Mac, and Marge, bound by their upbringing rather than blood, live in the family home left by their late foster parents. Raised to prepare for society’s collapse, they’ve inherited a hidden underground bunker designed to weather the chaos their parents warned would come this year. But for the siblings, survival means more than just enduring—they want someone to join their makeshift family in the bunker.

After a long road trip, they arrive in a busy city, searching for the perfect companion to share their refuge. Naomi, a young woman planning a night out, unknowingly catches their attention. Marge, struck by Naomi’s presence, decides she’s the one they’ve been looking for. The siblings discreetly follow Naomi, learning her routine, and spot an opportunity in a multi-story parking garage. As Naomi reaches for her keys, Noel and Mac approach in their van, and Marge orchestrates a swift abduction.

Taken to the bunker, Naomi faces a tense and unsettling captivity, grappling with the siblings’ intense vision of a shared future. As she navigates their psychological pressure and tests her own resilience, Naomi searches for a way to escape. Will she outwit her captors and break free before the world above unravels, or will she remain trapped in their isolated sanctuary?