Young Helen Braithwaite is posted to Poland as a cover for clandestine activites behind the Iron Curtain. She soon becomes dangerously involved in a plan to help them escape to the West. At a time of seething unrest in Eastern Europe, Helen finds herself in great danger and all her inner resources are tested to the full.

Soon after taking a job at a London publishing house, young Helen Braithwaite is posted to Poland as a cover for clandestine activites behind the Iron Curtain. Befriending a Polish couple opposed to the Communist regime, she becomes dangerously involved in a plan to help them escape to the West. At a time of seething unrest in Eastern Europe, Helen finds herself in great danger and all her inner resources are tested to the full.