When a great earthquake rocks the Pacific Northwest, fifteen-year-old Rowan Morgan is hiking in a suburban forest. Tremors rip the coast from Oregon to Alaska and turn Rowan's world upside down. After her father is wounded and taken to the hospital, he orders Rowan and her brother to stay inside his earthquake-proof, survivalist home. While the electrified fences offer some protection, it isn't long before mobs gather, desperate for some of the food and water rumoured to be held inside.