A good take on the basic "Keep on the Borderlands" situation, that is an outpost on the edge of civilisation under attack from monsters. Instead of the usual humanoid tribe, undead are making the incursions; a crypt was unwisely opened, and local attempts to deal with the problem have led to most of the militia being wiped out. A perfect time for adventurers to arrive; as well as cleaning out the crypt, there are a number of lesser quests to undertake, such as investigating the noise in the basement of an inn, and capturing local bandits.
Nothing very original here, but solid fare which should provide good gaming. There is a background story which is easily adapted; you might want to change some names: King Trevor?
Written for Raven of the Scythe, but it is simple enough to restat for low level D+D, WFRP or Runequest.