In the near future, a civil servant is offered the salary of her dreams and is, shortly afterward, told what project she'll be working on. A recently established government ministry is gathering "expats" from across history to establish whether time travel is feasible--for the body, but also for the fabric of space-time. She is tasked with working as a "bridge": living with, assisting, and monitoring the expat known as "1847" or Commander Graham Gore....

A good man in a bad world, Jon Sigurdsson is 59 and divorced: a senior civil servant in Westminster who hates many of his colleagues and loathes his work for a government engaged in unmentionable acts. A man of conscience. Meg Williams is 'a bankrupt accountant - two words you don't want in the same sentence, or anywhere near your CV'. She's 45 and shakily sober, living on Telegraph Hill, where she can see London unfurl below her. Somewhere out there...