When it comes to getting away from it all, it's quite difficult to do so more thoroughly than vacationing on a completely different planet. Especially if you live in one of the quite small number of solar systems which have more than one planet with a breathable atmosphere.
In this case, a rather badly-polluted urbworld is sharing a system with a midworld that nuked itself back to the Iron Age a few centuries back and has been intermittently used variously as a penal colony and adventure tourism destination by its neighbour ever since. And the latter is what four workmates are planning to do for a month...
Except that thanks to a passing freighter ditching gash at the worst possible moment, the intrepid campers find themselves climbing out of their lifepods as the wreckage of their shuttle falls around them, several thousand miles from their intended campsite.
This might be a somewhat longer vacation than they'd intended.
