Our Ice Age Fortress

Claire Shaw dies in a frigid apocalypse, reborn 90 days before. Armed with memories, she persuades husband Cole Carter to sell their house and build a cold-proof 'Steel Great Wall' at their family home. They hoard supplies. When extreme cold arrives, Claire rejects pleas for help from her Mother-in-law and Brother-in-law's family, who caused her death. Claire Shaw and Cole Carter become the last survivors.