1944, New York City. Judy Washington is tired of having to work at the Bronx Slave Market, cleaning white women’s houses for next to nothing. She dreams of a bigger life, but with her husband fighting overseas, it’s up to her and her mother to earn enough for food and rent. When she’s recruited to join the Women’s Army Corps, Judy jumps at the opportunity. During training, Judy becomes fast friends with the other women in her unit: Stacy, Bernadette and Mary Alyce. Under Second Officer Charity Adams' leadership, they receive orders to sort over one million pieces of mail in England, becoming the only unit of Black women to serve overseas during WWII. However, their work becomes personal when Mary Alyce discovers a backlogged letter addressed to Judy.