This is a nicely-presented low level adventure that could be dropped in anywhere suitable in your own campaign world. Basically, the overlords of the area have gone to the bad, raising taxes and offering little but abuse and bad treatment in return. Other senior individuals have decided that enough is enough, and hire the party to depose them.
The adventure itself takes the form of an exploration of the overlords' tower castle. The current occupants, a pair of brothers who are former adventurers themselves, is well-described with plenty of those little details that make a location come to life (although with the occasionally jarring spelling mistake - 'ore' for 'orc' on a few occasions, for example). This is supported by a basic hand-drawn sketch plan.
The expectation seems to be that combat is the only form of negotiation... perhaps that is all the Ironrod brothers now understand. Although the backstory is quite detailed and explains why the brothers are how they are, there is little suggestion as to how they'd respond if the party tries to discuss matters with them. Maybe things have gone too far for that.
A couple of nice touches are a photo of a suitable tower and one of the uniform tabard worn by tower guards (although the design doesn't mesh with the text's description of their coat of arms).
This should make for a merry evening's adventure, a side-trek perhaps, or possibly leading to more.