This is an ambitious sci-fi comic set in the near future, 50 years after a change in the sun's radiation killed all mammals on earth who lingered in the sun's rays. Small groups of humans managed to survive by hiding in basements, subways, tunnels, and caves and only venturing out at night. Now, 10 year old Elvie and her adopted guardian Flora travel the Pacific Coast trying to invent a cure. Flora has developed a medicine from the scales of monarch butterfly wings that keeps people temporarily safe, but it's not a final solution. They encounter various windfalls and dangers on the road- earthquakes, shipwrecks, a lost child, butterflies, enemies and allies. The art is dynamic and beautifully watercolored, but I got bogged down by the occasional dense text-heavy page, and overall the book took me a lot longer to read than comics usually do. But I still enjoyed it, especially recognizing the ravaged remains of classic west coast landmarks and Elvie's inventiveness and bravery.