If you had three days' warning of the end of civilization and a safe place to hide: What would you take with you? Who would you save? And who would you leave behind? Henry Willingham and his friends have three days to make the most terrifying decisions of their lives. The world has been infected by an inescapable living nightmare of alien vegetation that will replace all life on Earth. They must get everyone they love safely underground into a fallout shelter. There's not enough time. There's not enough room for everyone. Who will they save? Who will they leave behind? How will they live with the consequences? After hiding underground for a year, the last three survivors must brave the otherworldly infestation and travel through what used to be upstate New York struggling for their lives and their humanity.