Greenland 2: Migration

Five years after the Clarke interstellar comet destroyed most of Earth and civilization, the planet's environment has become chaotic, as sudden electromagnetic storms can form, along with lingering radioactive fallout and earthquakes from the impact. The Garrity family survived since the disaster living in an underground bunker in Greenland, with Allison now a leader, John a scout and engineer maintaining the community, and their now teenaged son, Nathan, who wants to be a scout. Earthquakes collapse the bunker, forcing an emergency evacuation. Most of the survivors are killed by a tsunami and the facility is destroyed.

The Garritys and Dr. Amina escape on a lifeboat with a handful of survivors, barely making it to Liverpool. The last Greenland survivors are separated when a gun battle occurs among locals trying to enter another rescue bunker. They reach London, recuperate, and continue onward toward France, believing the impact crater left by Clarke in the former Gulf of Lion and Mediterranean Sea is where humanity has begun to rebuild. Survivor network rumors say the area is heavily defended by the military, the land is farmed, and the tectonic and radiation problems have ended.

The family learns John is dying from radiation sickness due to his scouting work, and Amina is shot and killed by bandits en route to Dover. The family crosses the English Channel, now a dry windswept wasteland, and meet a French family in Calais that shelters them. At the French family's request, the Garritys take their daughter Camille with them to the crater. They reach the front lines of a raging military battle defending the crater region and are escorted behind the lines. On the way to the crater, bandits ambush their transport, and John is shot defending the group.

The family finally reach the crater, where they find fertile farmland, fresh lakes, and clear skies free of ash and energy storms, confirming worldwide rumors that the impact site had healed. Earth was recovering quickly, earlier suggested by Amina that if true, could be similar to the sudden growth seen after the Cretaceous–Paleogene extinction event. The survivors rest before a safe valley. John succumbs to his wound within sight of their goal, satisfied he protected Allison and Nathan for a safe new life.