There have been ghosts on the London Underground, sad, harmless spectres whose presence does little more than give a frisson to travelling and boost tourism. But now there's a rash of sightings on the Metropolitan Line and these ghosts are frightening, aggressive and seem to be looking for something.
Enter PC Peter Grant junior member of the Metropolitan Police's Special Assessment unit a.k.a. The Folly a.k.a. the only police officers whose official duties include ghost hunting. Together with Jaget Kumar, his counterpart at the British Transport Police, he must brave the terrifying the crush of London's rush hour to find the source of the ghosts.
Joined by Peter's wannabe wizard cousin, a preschool river god and Toby the ghost hunting dog their investigation takes a darker tone as they realise that a real person's life might just be on the line.
And time is running out to save them.
Peter Grant is looking after his cousin (who wants to be a magical practitioner as well) when he gets called in by the London Transport Police – there is something odd (and by odd they mean magical probably) happening on the Metropolitan Line and the Folly is needed to sort it out. PC Grant, Nightingale, Peter's cousin, Toby the Dog and sundry other members of the Police are going to have to do all they can to save a woman's life (oh and also sort out what to do about a new river god at the same time!)


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