Rosetta Stone's long-awaited Crystal Frontier linguistic survey has already been thrown off by a bout with disease, and to make it worse on their arrival to the first town on the list, rumors from the south of a coup and a brewing conflict over the throne have set the frontier on edge. And to add insult to injury, a meteor goes right over town and smashes it flat, and who's just arrived in town not hours before, a prime suspect and a unicorn to boot?

Out of money, and run out of town, Rosetta's only option is to partner with a mountain mare to scavenge the meteor for its rare materials and hopefully pay off their debts. Rather than sky steel, however, what they find will leave them in the history books forever.

If the brutal wilderness of the frontier, the xenophobic Duke of Snowybury's militia, or Sombra's usurping troops don't kill them first.