Son of Harlem, Lieutenant Vincent LaSalle has unexpectedly come home for a single day. Tomorrow he begins the journey to rejoin his unit in England. Heartsick with love and worry for the soldier who unexpectedly appears on her doorstep, Vierna Lillis nearly faints with surprise. The couple's brief reunion is only the beginning of a story that will traverse the globe and take both to places neither could have imagined. In England, Vince becomes linked to Jan Holling, an adjutant to her nation's code breakers and the woman sent to Berlin on a harrowing mission . When her and the international team she is a part of are captured and tortured, because of fears about secrecy, an outsider is needed to affect a rescue. Vince is recruited and asked to do the impossible--steal into Berlin with the help of the Polish resistance and get Jan and the others out. Amazingly, the dark soldier is able to achieve his target. But will he and the others make it out alive?