Travel to Berlin in 1939 is treacherous. Carrying out two clandestine missions in the enemy capital could prove deadly. When a Quaker Kindertransport chaperone is murdered in the East End of London, Britain's counterintelligence spymaster tasks Olivia Denis to join the group rescuing children from Nazi Germany. Olivia must find not only a killer, but a traitor relaying sensitive material to the enemy. Once...