This graphic novel adventure tells the story of 10-year-old Elvie and her crucial mission to save humanity from extinction after a sun shift has changed life on earth as we know it. It's been fifty years since a sun shift wiped out nearly all mammal life across the earth. Towns and cities are abandoned relics, autonomous machines maintain roadways, and the world is slowly being reclaimed by nature. Isolated pockets of survivors keep to themselves in underground sites, hiding from the lethal sunlight by day and coming above ground at night. 10-year-old Elvie and her caretaker, Flora, a biologist, are the only two humans who can survive during daylight because Flora made an incredible discovery - a way to make an antidote to sun sickness using the scales from monarch butterfly wings. Unfortunately, it can only be made in small quantities and has a short shelf life. Free to travel during the day, Elvie and Flora follow monarchs as they migrate across the former Western United States, constantly making new medicine for themselves while trying to find a way to make a vaccine they can share with everyone. Will they discover a way to go from a treatment to a cure and preserve the remains of humanity, or will their efforts be thwarted by disaster and the very people they are trying to save?