"Word has spread from all across the territory about a strange sickness that quickly kills it’s victims, only to have them rise again from the grave with a thirst for blood. Marshal Bill thinks he’s found the cause. A mysterious coffin-sized box arrived in town this morning, guarded by a group of oddly clad foreigners. With sun going down, there’s no time to spare..."
As usual, available from Wargames Vault and Wiley Games.