After the battle at Gray Tooth, the Korsmal Alliance seems to be militarily defeated. However, Marshal Nadjescha von Leufurten senses the dangers that the emergence of the Goblin War Drum brings. The war weapon of Kunga Suula, which has caused devastation of unprecedented scale, must be destroyed - even though no one knows how to accomplish that. During the lengthy magical analysis of the artifact, it will be up to the heroes to guard the drum at a castle of the Ram Order and defend against the treacherous attacks of the remaining cultists and their new allies. Alongside beastmen, river pirates, and dragon riders, they encounter old acquaintances such as Count Thezmar Alatzer of Hinterbruch and the former Marshal Jucho von Dallenthin and Persanzig. In the fifth part of the Theater Knights campaign, the heroes penetrate the cultic center of their adversaries.