A massive cumulonimbus cloud suddenly formed in the sky, unleashing a thunderstorm that began ripping apart trees and wetting the heads of all travelers in the region. In order to escape the storm, the PCs take shelter in an old, but solid, building that they come across. As the PCs enter the building(south), a sudden thunderbolt strikes the building, causing the already rotting doors(east, north, west) to fall apart. Upon breaking, a pack rats storm the central chamber, where the PCs are, and attack immediately. As the PCs quickly dispatch the rats, more rats come to aid their fallen comrades, but quickly succumb to the might of the PCs. After felling all the rats, the PCs feel an evil aura within the halls of the building and decide to find and end the source of this evil.