There are some things which even the closest friendship cannot survive.... Neighbours Edie Kelsey and Lil Horton have been friends for more than twenty years, sharing the joys and sorrows of tough lives as the wives of fishermen in Grimsby. So it was no surprise that their children were close and that Edie's son, Frank, and Lil's daughter, Irene, would fall in love and marry at a young age. But the declaration of war in 1939 changes everything.

In Secrets at Bletchley Park by Margaret Dickinson, two young women from very different backgrounds meet in the Second World War and are plunged into a life where security and discretion are paramount. But both have secrets of their own to hide.

Scarborough, 1880. Young Jeannie spends her days watching her mother and the other harbour girls sitting at the water's edge - mending nets, gutting herring - and waiting for her friend Ethan Wharton to come in on his father's fishing smack. As she was growing up, Jeannie always expected to marry Ethan, who is loyal and dependable. But then she meets Harry - a stranger who has come to visit from Hull for the day - and she falls for him.

Hull, 1874. Clara had always wondered about the beautiful, mysterious Jewel Newmarch, who was adopted as a baby and turns heads wherever she goes - her exotic looks point to her origins far away from the streets of Hull. Even at her twin sister Elizabeth’s wedding, Clara knows that Jewel is the belle of the ball. And as Jewel looks on at the happy, newly-married couple she feels a restlessness and intense longing to know her own roots.

Occupied Poland, 1942: Despite the constant presence of German soldiers in her village, Emilia is allowed certain freedoms as a midwife—the most precious is innocently cycling past Nazi checkpoints to the homes of expectant mothers on her rounds. But Emilia has a secret: for years she’s also been visiting the hidden Jewish mothers and working for the resistance…until she is betrayed.

It is 1940s coastal Lincolnshire, and Carolyn Holmes is keen to do what she can for the war effort. Raised on the family farm, she battles with her mother to further her education, although nothing is too good for her brother. Phyllis Carter, a bitter widow from the Great War, lives close by with her son, who works on the farm. When Peter decides to volunteer, a distraught Phyllis blames Carolyn, who leaves to join the ATS where she meets Beryl. Carolyn and Beryl are posted to Beaumanor Hall in Leicestershire as ‘listeners’, the most difficult of signals intelligence gathering.

Hull, 1856. James Ripley and his wife Moira have always looked out for the poor of Hull. When, during one stormy night, there is a flood in a nearby cellar—a popular shelter for the homeless—James rushes to help. Among those rescued is a dark-haired little girl who speaks a language no one can understand. Some say that she came to the cellar with her mother, but no one knows where the mother is now. Concerned for the child's safety, James is unsure of what to do.

Christmas 1860: Polly, living in grinding poverty, loses her mother in childbirth and finds herself alone on the streets of Hull. Rosalie, brought up in affluence and comfort on the other side of town, loses her own mother in similar circumstances and on the same day. Polly takes a job as scullery maid in Rosalie's lonely house, and the two girls form an unlikely friendship. Travelling to the North Yorkshire Moors they discover a new kind of life and find unexpected joy and fulfilment.

Can two friends find hope in hard times? Ruby and Grace have grown up in the poorest slums of Hull. Friends since early childhood, they have supported each other in bad times and good. But their families are bound together by more than friendship, and secrets from the past threaten to make their lives even more difficult. The local cotton mill has provided work for Ruby and Grace since they were nine years old, and now, years later, both girls find themselves the objects of attention from the mill owner's sons.

For 10 years Delia has had to fend for herself and her son, Jack, and as a young unmarried mother, life has never been easy. Every new coat and pair of shoes was bought with what little money she could scrape together as a singer on the stage. But when the theatre work dries up, Delia faces a dilemma: continue the search for employment with no knowing whether she'll find the stability and security her son needs or return to the place that should be home...where only spite and hatred await them.