Colivar is a Kingdom plagued by seemingly random incursions from the Infernal Domain. For centuries, the Order of the Vigil has fought to stem the tide and preserve the Realm, but politics and uncivil wars have depleted their ranks. For reasons unknown, the High Prince of Hell has decided to lend them a hand in the form of a demon in exile. Deep in the jungles on the Realm’s eastern border, a Vigil Campaign becomes more deadly than anyone imagined. Struggling to control his inner madness, a demon-slayer finds himself in the worst of all possible positions as he confronts a clan of heretics and their demonic overlords.