When heart-broken Sarah Quinn is left to care for her father and siblings when her mother dies, it’s hard to watch their loving dad, Fred, drift into drink and despair. With money tight, Sarah is determined to keep the family together. But they receive a shock when Fred Quinn announces he is to marry Mavis Swindel, the landlady of a boarding house on the edge of the moors. Mavis seems to offer the answer to the family’s problems, and soon they are all moving into her shabby lodgings. It quickly becomes clear that their stepmother has plans for her new family.

One winter's night, in the coal-hole in her yard, Rosie finds that a woman sheltering there has been severely beaten by thugs. At a glance, Kathleen looks like an unkempt, aged vagabond who tramps the roads carrying all her worldly possessions in a grubby tapestry bag. Her only friend is the mangy old dog who accompanies her; the sum of her life is in the diaries she so zealously guards. Yet close up, Rosie can see that Kathleen has a gracious beauty – the 'look' of a respectable lady of means.

Lucy Nolan is the golden girl. The only daughter of local grocers, Sally and Mike Nolan, she's grown up in a home of total love and security. The one thing her heart desires is that Jack Hanson might ask her to marry him, and when he does eventually propose, Lucy is prepared to give up everything to be with him—even though it means leaving her beloved parents to live abroad where Jack has been offered an exciting business opportunity. But then, almost on the eve of the marriage itself, tragedy strikes.

Rita Blackthorn’s heart was barren and hard. In all of her life, she had never truly loved. But she had hated. Beneath the loving gaze of her daughter’s soft green eyes, her heart swelled with dark and dangerous emotions. Young Cathy Blackthorn has never experienced any loving response from her mother. It is her beloved Aunt Margaret, with a heart as big and warm as the summer sky, who has been more of a mother than her own could ever be. And when Cathy’s father brings home a London street urchin, Cathy despairs of ever winning her parents’ love.

Bella can’t wait to be married to her fiancée Sidney, and dreams of the day she will walk up the aisle to be given away by her widowed father, with her bookish sister Alice as her bridesmaid. Their lives are disturbed when they receive a letter from their fourteen-year-old cousin Millie. Taken in by her austere aunt and uncle when her parents were killed in an accident, Millie says she is being badly treated and pleads to be rescued. When the two sisters take a trip to find out the truth, things take a troubling turn.

Despite a deathbed warning from her beloved mother, Phoebe Mulligan has no choice but to throw herself on the mercy of her uncle, Edward. Wrenched from all she holds dear, the tragic young girl is delivered to Blackburn town, where she must live in a household terrorised by the cold, forbidding presence of her mother's brother. Phoebe cannot understand why she is treated so harshly by Edward Dickens. She is not to know the guilty secret that lies in his past, a secret that casts a sinister shadow over his feelings for his lovely niece.

Beth Ward and Tyler Blacklock share a love they know will last forever. But Beth’s mother, Esther, is jealous of the girl’s happiness and seizes an opportunity to be rid of her daughter. Banished in disgrace from the family home, Beth takes the northbound train and alights at Blackburn, friendless and alone. On this day, Fortune smiles, for Beth is taken in by warm-hearted Maisie Armstrong, a widow with two children. Money is scarce, but love abounds in the cosy house on Larkhill, and Beth is content there to await the birth of her child.

The marriage of Marcia and Curt Ratheter seems idyllically happy. As much in love now as on their wedding day, nothing can mar their joy. But one fateful day in 1931, Curt disappears, leaving Marcia her two daughters bereft. Then Barty Bendall admits his love to Marcia. Desperately trying to forget the past, Marcia moves to Blackburn with him, but soon Barty sinks into bad ways, tyrannising the family. He particularly focuses his aggression on Polly, Curt and Marcia’s first-born, blonde as an angel but afflicted since birth with an ominous shadow over her health.

Lizzie Miller worries for her family – money is short in their little house, but her beautiful daughter Ruby vows to give them all a better life. Working as a maid for Mr Banks, Ruby befriends his shy and gentle daughter, Cicely. The two girls hatch a mischievous plan to introduce Ruby to society at a party for the ‘gentry’ of Blackburn, where Ruby meets Luke Arnold, the dissolute heir to his father’s fortunes.

In 1975 Lucinda Marsh throws herself in front of a speeding train leaving her 12-year-old daughter Kitty alone, confused and abandoned – save for a selfish aunt, a violent father and her childhood sweetheart Harry Jenkins. When Kitty is sent to an orphanage after the death of her father, she meets Georgie, a lively cockney girl who, through the following difficult years, becomes her loyal friend. Convinced that her feelings for Harry will ruin the brilliant future that lies ahead of him, Kitty turns her back on his love.

Ada Williams once believed money and power would bring her happiness. But now she is all alone except for her greedy son Peter, who waits only for the day he will inherit her fortune. Ada, however, has a different plan altogether. A few miles away in Blackburn, the Bolton family may be poor – but the love they share means they can overcome almost any adversity. But no one could foresee the shocking events of Christmas night 1932, which split the family asunder, leaving Larry crippled and the twins, Ellie and Betsy, in a foster home.

Ten years ago, Louise Hunter's life was torn apart by tragedy. Her husband, Ben, killed himself; her brother-in-law, Jacob, was murdered; and her sister, Susan, abandoned her newborn daughter, revealing the baby is Ben's child. Louise remains haunted by guilt over the one night she spent with Ben's friend Eric and refuses to return Eric's love. But after adopting Jinnie, she finds new happiness – until Susan decides she wants Jinnie back.

In the middle of the night, Evie is torn away from her beloved home and close-knit community as her family run away to the south. Her father's luck has finally run out, but what should mark a hopeful new beginning is just the start of young Evie’s troubles. With the weight of her family's future on her shoulders, Evie has no one to turn to. Her mother, worn down by life, runs off with a new man, and with her grandmother's sight failing, it's left to Evie to earn their keep and run the house. Holding her family together is only made harder when tragedy strikes at its heart.

‘I can take him away from you any time I want.’ Her mistress’s cruel taunt is deeply disturbing to Jenny Dickens—why would Claudia be interested in a servant’s sweetheart? All the same, Jenny reckons without Claudia’s vicious nature. Using a wily trick, Claudia seduces Frank who, overcome with shame, leaves the household for a new life in Blackburn. Losing Frank is just the first of many disasters that leave Jenny struggling to cope alone.

On a fateful night in 1860, Thadius Grady realises, too late, that he has made a grave mistake. In blind faith he has put himself and his daughter Emma at the mercy of his sister and her conniving husband, Caleb Crowther - for he has entrusted to them his entire fortune and the daughter he adores. With his dying breath he pleads to see his daughter one last time - but Caleb's heart is made of stone.