1942. Polesie. The occupation regime is getting tougher day by day. In response, popular discontent is growing, and the partisan movement is also gaining strength. Underground workers of a small district center manage to intercept an army courier with documents containing top-secret plans of the fascist command. But how to transport them across the distant front line if the Gestapo, preoccupied with the actions of the partisans, has already begun a cunning and insidious operation?..