FBI agent Jack O'Connor receives a letter from Maggie, a woman he used to love, saying she's in trouble in Berlin. The FBI refuses to get involved, so Jack asks Allie Fortune to help him investigate. Allie and Jack pose as a missionary couple who want to bring orphans back to the United States.

A child finds important documents that everyone in the city - Soviets and allies alike - want for themselves. Maggie refuses to tell Jack what the documents are, saying if things go wrong, they are better off not knowing.

Through the course of the search, Allie's past has been brought back to her, half a world away from home.