Meanwhile, Corporal Nobbs and Sergeant Colon begin an investigation into the theft of the fifty-foot painting, "The Battle of Koom Valley" by the insane artist Methodia Rascal, from a city art gallery. Most of the populace believe the painting holds clues to a treasure hidden in Koom Valley. Nobbs has a new girlfriend, exotic dancer Tawneee; Nobby first caught her eye when slipping an IOU into her garter. Other subplots involve the tension between vampires and werewolves (new recruit Lance-Constable von Humpeding and Sergeant Angua), and the presence of Vetinari's auditor, A.E. Pessimal, in the Watch House.