Underground

Five years ago, Thor's Chitauri army decimated the Earth. Now what's left of humanity lives in bases under the Earth's surface, safe from the toxic atmosphere. Tony likes to think that humanity's adapted pretty well. After all, they have movie nights and dances; they're doing better than could be expected. But when he learns that the little world of safety and stability they've carved out is about to be slowly but surely destroyed, the New York Underground is left with only two options--fight or flight. Tony knows which one he wants. If only Steve weren't on the exact opposite side. Meanwhile, Natasha wants whatever option will save Clint, Pepper wants whatever option will save the base, Maria Hill wants whatever option will save everybody, and nobody's exactly sure who Loki's trying to save, but everyone's hoping it's more than just himself.