Raise Kids in the Apocalypse

Haunted by the agonizing memory of watching their twin children perish in an arctic wasteland due to treacherous relatives, a devoted couple wakes up seven days prior to the cataclysmic freeze. Liquidating their fortunes, they convert a subterranean garage into a high-tech fortress stocked with advanced climate controls and survival reserves. When temperatures plunge into lethal subzero extremes, they shut their doors against the manipulative relatives who once doomed them. Defending their cozy underground haven against violent raiders and frigid perils, the parents do whatever it takes to ensure their children survive the endless winter.