Ro is a medical doctor currently practicing in Sydney. Following the traumatic disappearance of her son, she left her home and marriage in Carralon Ridge. Returning for the five-year anniversary, she meticulously reviews old research notes and video footage. She seeks answers about her son's fate while feeling suffocated by the heavy decay of the town.

Griff is Ro's estranged husband, who chose to remain in Carralon Ridge after their son disappeared. He rents their former family home from the Lentzer mining company and works as a community fire safety officer, patrolling the area for hazards. His exhaustion and stoicism mask a deep, immobilizing grief that keeps him tied to the dying town.

Noel is a devoted resident and one of the last holdouts in Carralon Ridge. Alongside his aging father, he fought against the mining company to preserve the town's history. He is heavily invested in a backyard shed project called the "Last Chance Saloon," constructed from salvaged relics to preserve their local heritage.

Sam is Ro and Griff's son who vanished five years ago while conducting university research on Carralon Ridge's decline. His disappearance fractured his family and remains the town's central mystery. He is remembered as an empathetic, inquisitive young man who struggled with a sense of personal guilt.

Della is Ro and Griff's 23-year-old daughter who works as an accountant in Sydney. She returns to Carralon Ridge annually for the memorial of her older brother's disappearance. Methodical and composed, she acts as a mediator for her estranged parents and discreetly seeks her own answers regarding local rumors.

Bernie is an elderly, lifelong resident of Carralon Ridge whose health is steadily deteriorating. He is deeply intertwined with the community and harbors a rigid resentment toward the mining company. He refuses to leave the dying town out of pride and a stubborn attachment to his past.

Damien is Griff's cousin and Warren's brother, working UK hours for a London legal firm from his isolated town house in Carralon Ridge. He feels lingering guilt over his brother's death, which occurred after Damien pressured him to sell their family property. He is the last known person to have seen Sam alive.

Sylvie is the resilient operator of the local pub, the Black Creek Inn, and the former partner of the late Warren Hillary. As an outsider who fell in love with both Warren and the town, she holds a unique perspective on the community. She carefully guards the details of her final interactions with Warren, drawing Ro's suspicion.

Warren is Damien's brother and Griff's cousin who died three years before Sam's disappearance. He felt torn between his devotion to his ancestral home and his relationship with Sylvie. His empty farmhouse, complete with untouched sausages on the barbecue, remains a haunting location in the town.

Darcy is Noel and Heather's eldest son and was one of Sam's closest childhood friends. He is increasingly disillusioned with his family's fixation on Carralon Ridge's past and harbors frustration over the lack of opportunities. He and Jacob share an unspoken understanding regarding their teenage years.

Jacob is Ann-Marie's son and the quieter, more anxious counterpart to his friend Darcy. As one of Sam's childhood friends, he carries a heavy burden of remorse for their past teenage actions. He appears visibly haunted by the tragedies surrounding Warren and Sam, maintaining a careful silence.

Ann-Marie is a former resident of Carralon Ridge who was pressured into selling her property to the mining company. She maintains a defiant attachment to her old home, risking trouble to maintain its appearance despite no longer owning it. She previously served as a local medical responder.

Heather is Ro's oldest friend, having met her as a young health professional in Sydney before moving to Carralon Ridge to marry Noel. She struggles with the intense isolation of the dying town and the increasingly difficult behavior of her frustrated teenage sons.

Kyle is one of Noel and Heather's younger teenage sons. Bored, frustrated, and lonely in the sparsely populated town, he frequently acts out. He exhibits destructive behavior as a direct reaction to his family's rigid refusal to relocate.

Zach is another of Noel and Heather's teenage sons. Trapped in a dying community with no friends or organized activities, he channels his restlessness into vandalism. His behavior illustrates the heavy toll the town's decline takes on its younger generation.

Meaghan is an old schoolmate of Della's and Darcy's former girlfriend. She provides Della with secondhand information about a drunken altercation between Darcy and Jacob, sparking new questions about the town's buried history.