In 2040, following the Yellowstone eruption, society collapses as people flee to alternate Earths. Joshua Valiente confronts rising tensions with emerging super-bright post-humans, while Navy Commander Maggie Kauffman explores the far Long Earth. Meanwhile, Sally reconnects with her estranged father, who has his own secretive plans.
In 2040, following the Yellowstone eruption, society collapses as people flee to alternate Earths. Joshua Valiente confronts rising tensions with emerging super-bright post-humans, while Navy Commander Maggie Kauffman explores the far Long Earth. Meanwhile, Sally reconnects with her estranged father, who has his own secretive plans.