It's the austere 1948 world of post-war, black-market-riddled England, and Jethro, the cat burglar and jewel thief, has been pushed out onto the rooftops of London again by Colonel Walsingham of MI5. And so, forced once again to step out from behind his disguise as a part-time stage-hand in London's West End, Jethro does a creep in Mayfair and sets in motion a tale of dark and deadly dealings that mixes national politics with black magic, orgies of abandon, and blackmail. Things get even deadlier when he stumbles across a royal cover-up and then uncovers a plot to topple Clement Attlee's Labour Government.