Before PC Peter Grant can get his head round the case a town planner going under a tube train and a stolen grimoire are adding to his case-load.
So far so London.
But then Peter gets word of something very odd happening in Elephant and Castle, on a housing estate designed by a nutter, built by charlatans and inhabited by the truly desperate.
Is there a connection?
And if there is, why oh why did it have to be South of the River?