Decades ago, an Osiriani Pathfinder named Bossell locked his transformed lover in the vaults beneath the Sothis Pathfinder Lodge. He then vowed that no one would ever discover his secret shame. The old and senile Bossell now relies on his assistant Fendel for everything, and the hapless assistant has disapeared into the vaults after reading his master's journal. You've been sent beneath the Lodge to destroy whatever it is that Bossell's lover has become—will you survive his secret or find yourself transformed as well?