Jess is a journalist nearing forty who has lived in London for ten years. Facing financial strain and recovering from a recent breakup, she returns to Sydney when her grandmother suffers a severe fall. She finds comfort in Victorian literature and applies her professional investigative skills to explore a cold case connected to her ancestors, utilizing a true-crime book she discovers in her grandmother's house.

Jess's mother, who lives in Brisbane and has maintained a distant relationship with her daughter for many years. Her personal history is largely filtered through Nora's stories, which paint her as too anxious to be a capable parent. She struggles with feelings of isolation but actively seeks to rebuild her bond with Jess following Nora's accident.

Jess's octogenarian grandmother who resides at the sprawling Darling House in Sydney. After taking Jess in as a child, she operated as a highly protective guardian who tightly controlled her granddaughter's understanding of the world. She guards decades-old secrets about the Turner family and refuses to let others dictate her life choices.

An Englishwoman and former scientist who relocates to Australia after World War II. Living at the grand Halcyon estate, she feels isolated and out of place in the unfamiliar rural environment. She becomes the central figure in a massive local mystery when she and her children are discovered dead following a summer picnic.

The local grocer in Tambilla who stumbles upon the deceased Turner family near a water hole. Having survived childhood polio, he developed a deep affection for Victorian literature during his recovery. He feels a strong duty to his community but privately harbors unfulfilled dreams of exploration and travel beyond the grocery store.

Nora's older brother and Isabel's husband. He purchased the abandoned Wentworth property and transformed it into the grand Halcyon estate. He frequently pursues new business ventures and is away in London during the 1959 tragedy.

Percy's wife, who has been a constant presence in his life since they met as children near an abandoned mine. She actively manages the daily operations of the family grocery store and acts fiercely protective of her household.

An American journalist who utilizes creative nonfiction techniques to chronicle the events at Halcyon. His investigative writing deeply shapes the public understanding of the 1959 mystery and provides Jess with crucial clues decades later.

One of Percy and Meg's sons. In his youth, he maintains a close friendship with John Turner until a sudden falling out. Decades later, acting as a solicitor, he reaches out to the Turner family with new information about the cold case.

Percy and Meg's son. He becomes highly distressed following the 1959 incident due to his escalating romantic involvement with the eldest Turner daughter.

The eldest child of Thomas and Isabel. She experiences significant personal turmoil as a teenager and leans on her younger siblings for medical remedies shortly before the 1959 tragedy.

Thomas and Isabel's son. He trades items with friends in town and observes quiet tensions within the Halcyon household.

The youngest Turner daughter before the baby's birth. She operates as an amateur naturalist who feels a strong connection to the local environment, unlike her English mother.

Isabel's baby, whose disappearance on Christmas Eve 1959 sparks a massive local search. Her absence remains one of the central unsolved elements of the Turner Tragedy.

The lead police officer dispatched from Adelaide to manage local authorities following the discovery of the bodies at Halcyon.

The loyal housekeeper who has worked at Darling House for over seventy years. She provides Jess with vital historical context regarding Nora and the family's past.

Daniel Miller's niece, who preserves his interview notes and audio recordings. She defends his professional integrity and shares his archival materials with Jess.

Isabel's young helper and nanny. Her possession of a valuable rabbit netsuke draws police suspicion during the initial investigation.