This book takes a half-comedic, half-serious approach. The general story can be summed up like this:
Long, long ago, the Wild Hunt suddenly appeared, bringing cold and revolution, and never went away.
The future is bleak. Where can a hero be found? A mech pilot arrives and shouts...
I will build the finest machines, develop black technology, and make the Iron City of my dreams!
(Yeah, that's more or less what two of the teams are like.)
As for the other two teams... Well, imagine four super-comedians suddenly appearing in a world that was once utterly hopeless. Hehe~