German bombs fall on neutral Ireland in the first days of 1941. Are they deliberate or accidental? A message or the prelude to invasion? Paul Duggan and his colleagues in G2, the intelligence unit of the Irish army, have to answer these questions fast: any miscalculation could be fatal for Ireland's precarious neutrality. The pressure is on to find the one man who could help them - a German spy who has been operating under cover in Dublin for almost a year. Meanwhile, Duggan is running a routine operation with the help of a Jewish refugee spying on German fliers interned in Ireland when they're out on parole. But it turns out to be anything but routine and changes his life dramatically.