With an encyclopaedic knowledge of cake, and exclusive access to the church’s stockpile of holy weapons, the Order of the Crimson Rosary are on the frontline in the eternal war between good and evil. Whether it’s repelling demonic possession, judging the authenticity of supposed miracles or having the final say on the colour of bunting at church fetes, the organisation's members sacrifice their own freedom to keep the world safe.

Father Flynn, the top operative in the UK, has been responsible for a number of recent high profile gaffs. Given an ultimatum, he must choose between returning to his old job of preserving the last microfiche machine in the church’s library, or submit himself for rehabilitation.

Yet evil doesn’t take a ticket and wait in line, as the dreaded cannibal nuns from outer space land to begin their annual harvest. Can Flynn get himself sober enough to repel their evil machinations? Or will another idyllic British village become the nun’s latest buffet?

One thing’s for certain, to beat them, Father Flynn is going to have to kick the habit.