San Francisco, 2017. Clinton's in the White House, Brexit never happened - and Verity Jane's got herself a new job.

They call Verity 'the app-whisperer,' and she's just been hired to evaluate a pair-of-glasses-cum-digital-assistant called Eunice...

Only Eunice has other ideas.

Pretty soon, Verity realises that Eunice is smarter than anyone she's ever met. Which is just as well since suddenly some very bad people are after Verity.

Meanwhile, in a post-apocalyptic London a century from now, PR fixer Wilf Netherton is tasked with interfering in the alternative past in which Verity and Eunice exist. It appears something nasty is about to happen there - and fixing it will require not only Eunice's unique human-AI skillset but also a little help from the future.

A future that Verity fears may never be . . .