The eve of war: a secret so deadly, nothing and no one is safe

June 1939. England is partying like there's no tomorrow . . . but the good times won't last. The Nazis have invaded Czechoslovakia, in Germany Jewish persecution is widespread and, closer to home, the IRA has embarked on a bombing campaign.

Perhaps most worryingly of all, in Germany Otto Hahn has produced man-made fission and an atomic device is now possible. German High Command knows Cambridge's Cavendish Laboratory is also close, and when one of the Cavendish's finest brains is murdered, Professor Tom Wilde is drawn into the investigation. In a conspiracy that stretches from Cambridge to Berlin, and from the US to Ireland, can he discover the truth before it's too late?