Ben's 13th year was when his family fell apart, but his 14th year is when his whole world, or more precisely, the whole world, collapses. He had thought 13 was his unlucky number, the year that Time turned its back on him, but he was wrong; that year, it was he who had turned his back on Time. The following year, the fury of the sun turns back Time for everyone in the world. On PF (Power Failure) Day, a huge electromagnetic surge from the sun destroys the power grids and civilization as we know it. Living in the middle of downtown Kansas City makes survival nearly impossible. Starvation, dehydration, disease, freezing temperatures, and out-of-control fires imperil the desperate population. After facing unimaginable losses, Ben finds hope for the future when he meets Sara, who has endured her own share of agonizing loss. But when a murderous gang threatens to take away everything Ben has left, they flee to a wilderness area of a large city park where they learn to live off the land for survival.