@RaddumNot a whole lot has happened but I'll give you a summary of what has gone down:
Prince Blueblood, current headmaster of the Bellbrooke Reform School, panicked in his office. He had been embezzling money from the school funds intended for the human children at the school to fund expeditions out into the area surrounding Bellbrooke to look for wealth and magical artifacts. These have been very unsuccessful and gotten him nothing save for a pin that can protect the user from sunlight.
It didn't help he had to show an inspector from Equestria around the school that day. The inspector arrived and Blueblood (begrudgingly) showed him around. Lying through his teeth about the more questionable aspects of the school (disorderly sleeping areas not separated by sex or age, the use of Rended meat to feed the children on the cheap, amongst other things).
The Inspector believed Bluebloods lies and during an inspection of the classrooms, revealed he had been convinced by the school councilor Ms. Meadows to give the Headmaster a large sum of bits. Blueblood was over joyed, until her learned the money was to be spent on an extravagant Hearthswarming Eve celebration for the human children.
Blueblood bit his tongue and swallowed his anger. His resolve was pressed when he became aware one of the 'problem children' was absent from class and likely gone from the school entirely. Lying about her absence Blueblood excused himself and went back to his office, proceeding to throw a violent tantrum in anger over the funds usage.
In his anger however he things of a devious plan and rings the Mayor of Bellbrooke up on a crude telephone in his office. Threatening the mayor with incriminating evidence Blueblood had collected on him he forces the Mayor to commission any available adventurers/explorers to meet the Headmaster for a mission.
Going downstairs Blueblood proceeds to meet with a trio of adventurers who had answered his call. An experience gun touting local adventurer by the name of Beeline, a less then social Unicorn magic user by the name of Crepuscular Rays, and a reformed 'graduated' human going by the proper Equestrian name of Worried Mind.
Blueblood made it clear to the adventurers why he had gathered him. Offering him a very generous 'bonus' payment (taken from the money intended for the Hearthswarming party) if they went to an old, hidden church nearby and brought him back any valuable/magical objects they could find.
As this happened the problem children "Falling Down" made her way out from the Reform School walls and began wandering out into the snow. Happy to be out of the Reform School she began to explore the nearby woods, unaware she was followed by a local reformed human guard called Lightning Flash. Falling came across an old, decrepit church (the one mentioned before) and proceeded to try and enter. Unable to open the door she attempted to beat it down, however for Flash to reveal himself and blow the church door open in a 'helpful' display.
All the while Thundering Cloud, a reformed human guard, stood on duty atop of the wall surrounding Bellbrooke. Then from out of the woods animated human skeleton began to appear and rushed the walls...
And that's everything that's happened so far.