This first-rate spy drama has newlyweds Crawford and MacMurray honeymooning in 1939 Germany but secretly acting as British agents to obtain details of a new Nazi weapon, a magnetic mine. There are clues and menacing creatures galore, from a torn page of a Liszt concerto to cryptic chessmen,
from Rathbone, a sinister Gestapo chieftain tracking the pair, to Veidt, an underground leader aiding them. The honeymooners travel from Paris to Salzburg while under constant threat but are foiled by Rathbone who imprisons Crawford in a remote Bavarian castle; she is saved by MacMurray and
British agents before divulging her secrets and the pair, after a harrowing chase to the ...