Five years after a catastrophic comet strike devastated Earth, the surviving Garrity family must leave the relative safety of their bunker in Greenland and journey across a frozen, broken world in search of a new home. Faced with harsh elements and a collapsing civilization, they must rely on grit, ingenuity, and each other to survive.
Best friends Ruth and Megan run a vintage shop in Muswell Hill. Stumbling across a time machine, they embark on trips to the past to stock their shop with no idea of the irreparable damage they're causing to the fabric of the universe.