Publisher blurb: "What starts as a low-level investigation into a disturbance in the Symphony reveals a horrific murder with no possible suspects, a mental institution with several nasty secrets, and a rivalry between two Demon Princes that threatens to boil over into all-out war! Can your angels solve the mystery of The Rats' Revenge? This adventure for In Nomine was first published in the online version of Pyramid in 2001, but this version also includes complete GURPS In Nomine stats for all non-player characters and other important elements."