The Famine at Fort Kraken

From the introduction: The people living in and around Fort Kraken are starving. Something is killing off all the livestock and wild game in the area. All the crops have been destroyed. The Baron of Fort Kraken is importing meat and other food to feed his people. The citizens need your help in determining the cause of this famine so it can be stopped. Do your player characters have the mettle to end this tragedy? User summary: For 5th - 9th level characters.