Barney Thomson is back in the seventh and final episode of the crime series that has irrevocably redefined the barbershop death junky novel. Searching for answers to his tortured, murder-filled existence, Barney is drawn to take a job in London, as personal barber to Thomas Bethlehem, the head of an upcoming and trendy marketing agency. Such is Barney's fate, that just as he arrives in the capital, a serial killer by the name of Harlequin Sweetlips begins to run amok among the young, go-getting executives of Bethlehem's company. Suddenly, but entirely predictably, Barney is once again in the middle of a multiple murder investigation. As Satan returns to haunt Barney and to steer him down his final, inevitable path, could it be that Bethlehem's latest client, a wise-cracking New Englander with an easy smile and a handy ability with a thunderbolt, is the man to provide the deliverance that has eluded Barney Thomson for so long?

Résumé
Searching for answers to his tortured, murder-filled existence, Barney Thomsn is drawn to take a job in London. Such is Barney's fate, that just as he arrives, a serial killer by the name of Harlequin Sweetlips begins to run amok among executives of Bethlehem's company. Suddenly, Barney is again in the middle of a multiple murder investigation.