During World War II, 855 women joined the fight to fix the three-year backlog of undelivered mail. Faced with discrimination and a country devastated by war, they managed to sort more than 17 million pieces of mail ahead of time.

During the height of the conflict in World War II circa 1943, difficulties in the war led to a change in priorities, and much of the mail previously reaching soldiers on the front lines has been halted. As warehouses begin to overflow with unfulfilled deliveries, soldiers' hopes are dashed as they lose contact with their families back home. To fix this problem, the 6888th Battalion the Women's Army Corps' all-Black battalion including over 800 female soldiers is sent to tackle the impossible challenge of sorting years' worth of backlogged mail. Even as military higher-ups hope to see the plan fail, the Six Triple Eight are determined to deliver hope to soldiers and families across the world.