A future expedition into newly uninhabitable regions of Earth due to global warming goes terribly wrong. Of course it does. It's an interesting part of the plot: It's understood that some areas of Earth will become so warm and humid (look up "wet bulb temperature,) that humans won't survive on the surface as global warming progresses. What would that really mean for life on Earth? There's a lot more to this book, principally the unreliable first-person narrator. A perfect novella length.