After Major Boothroyd (aka Q) is unexpectedly ousted from his role with British Intelligence developing technologies for MI6's Double O agents, he is adrift, unsure of his place in a world where the stakes aren't always life or death. But when he learns that his childhood friend, renowned quantum computer scientist Peter Napier, has died in mysterious circumstances, Q is drawn back to his sleepy hometown of Wickstone-on-Water.

Frustrated by the police, who consider the case closed, Q is compelled to investigate, starting with a cryptic note Napier sent him on the day of his death. Q soon discovers that Napier's ground-breaking work may have attracted sinister forces . . . but can he decode the truth before danger closes in?