Mabel is an 86-year-old woman whose routine life is upended by the sudden death of her husband of 62 years. Grieving and isolated, she discovers an unfinished note left by Arthur that she interprets as an instruction to find her childhood best friend. This quest pushes her out of her comfort zone, leading her to form unexpected connections with a diverse group of women.

Arthur is Mabel's optimistic and dependable husband who dies peacefully in his sleep early in the story. During their 62-year marriage, he always encouraged looking toward the future, contrasting with Mabel's tendency to look backward. His sudden passing and the mysterious note he leaves behind serve as the catalyst for Mabel's journey.

Dot is Mabel's childhood best friend and the object of her lifelong affection. Vivacious and bold, Dot vanished from Broughton 62 years ago, just before Mabel's wedding to Arthur. She represents a passionate, alternative life that Mabel never pursued due to the rigid social norms of their youth.

Julie is a warm, bubbly caregiver who becomes Mabel's first connection to the outside world following Arthur's death. Though she struggles with the recent separation from her husband, she throws herself enthusiastically into helping Mabel search for Dot. Her outgoing nature gradually breaks down Mabel's walls.

Kirsty is a young, seemingly composed new mother who bonds with Mabel over a shared affection for Mabel's dog, Olly. Despite her perfect exterior, Kirsty struggles with profound loneliness and complex family dynamics. She quickly becomes an integral part of Mabel's new intergenerational support system.

Patty is a glamorous American expatriate and former model in her early seventies who brings worldly elegance to Broughton. As a dance teacher, she encourages Mabel to physically engage with life. Beneath her poised exterior, Patty misses her family and harbors her own regrets.

Erin is a perceptive teenage supermarket employee who forms an unlikely bond with Mabel. Facing judgment and bullying due to her sexuality, she fears her religious family's disapproval. Her contemporary journey toward living authentically mirrors the historical prejudices Mabel faced in her youth.

Bill is Mabel's older brother and Arthur's best friend, whose sudden death from a heart condition at age 25 shattered their youthful friend group. Remembered as handsome and full of life, his tragic passing was the catalyst for Mabel's marriage to Arthur and Dot's sudden departure from town.

Reg is a local history enthusiast in Broughton who offers to help Mabel track down information about Dot. Mabel remembers him from her youth as an unpleasant, smug man whose veiled comments and insinuations caused deep distress during a vulnerable time in her past.

Martin is Julie's estranged husband. Following their separation, he falls into old habits but remains an important figure in Julie's life as she deals with her heartbreak and contemplates their future.

Sarah is Patty's adult daughter who has relocated to live with her partner, Geoff, taking Patty's granddaughters with her. Her physical distance leaves Patty feeling isolated and prompts Mabel's well-meaning but misguided interventions.

Olly is Mabel and Arthur's pet dog. Following Arthur's passing, Olly becomes Mabel's primary companion at home, though he is generally standoffish until he forms an immediate, surprising bond with Kirsty.

Sandy is Kirsty's mother, who remarried shortly after the death of Kirsty's father. Her swift remarriage caused a deep rift with Kirsty, leading to a prolonged estrangement that leaves Sandy unaware of her new granddaughter.

Tony is Kirsty's stepfather, whose marriage to Sandy shortly after her first husband's death created lasting tension within the family. He hopes to be part of his stepdaughter's life despite her ongoing resistance.

Hannah is Erin's girlfriend. Their relationship becomes a source of tension when they are discovered by Erin's manager, exposing Erin to workplace bullying and amplifying her struggles with her family.

Ben is Kirsty's partner and Dotty's father. Because Kirsty is estranged from her family, Ben has never met her parents, a fact that deeply isolates their small family unit.

Geoff is Sarah's new partner. His relationship with Sarah caused her to move away from Patty, creating friction and prompting Mabel to anonymously interfere in their lives.

Kevin is the manager at the supermarket where Erin works. After catching Erin kissing her girlfriend, he engages in targeted workplace bullying until Mabel confronts him.

Estelle is the woman for whom Martin left his wife, Julie. She becomes a central figure in Julie's heartbreak and complicated feelings regarding Martin's future.

Joan is an old acquaintance of Mabel and Arthur from their younger years. She bluntly expresses her surprise at their marriage, planting early seeds of doubt in Mabel's mind about her past choices.

Charles is Dot's brother. He becomes a vital point of contact during Mabel's search to reconnect with her long-lost friend.