1944. The Germans have a new secret weapon and the RAF must find a way to deal with it.
A young and near-genius German scientist has developed a formula for a chemical agent with the potential to wipe out whole cities in one sweep of an aircraft. The staff at Bletchley Park and Downing Street need to know as much as possible about this Mem Tav, and how to eradicate it and the threat it poses.
David Landau, a first generation English–Polish Jew, now an officer in the RAF, is tasked with the job of uncovering everything he can about Mem Tav. His investigation takes him all over the world in an exhaustingly short time, and he finds help from the most unlikely of allies.
Landau is as brave as he is talented when he’s in his familiar cockpit, but can he perform this vital role for British Intelligence when faced with an unimaginable threat?