Genre: Crime, Drama, Thriller Creator, Writer, and Director: Claire Oakley Main Cast: Kelly Reilly (Jackie Ellis), Rafe Spall (Eric Bull), Jonathan Pryce, Naomi Yang, Harry Lawtey, and others Format: 6-episode miniseries (premiering January 30, 2026 on Sky Atlantic)

Detailed Plot Summary:

The series opens with sweeping, moody shots of the fictional Welsh coastal town of Morfa Halen, a close-knit community squeezed between towering mountains and a rapidly encroaching sea, threatened by climate change. The gray skies, howling winds, and vast salt marshes create an atmosphere of isolation and impending doom, as a once-in-a-generation storm brews offshore.

Jackie Ellis (Kelly Reilly), a former detective in her 40s now working as a schoolteacher, lives a quiet, isolated life in a small house near the salt marsh. Three years earlier, the unsolved disappearance of her young niece, Nessa (a 10-year-old girl), destroyed Jackie’s career and family ties. Suspected of hiding evidence due to her personal connection, Jackie was forced to resign from the police and became an outcast in the town. She now channels her energy into teaching local children, particularly forming a bond with her thoughtful 8-year-old student, Cefin.

On a foggy morning walk along the marsh, Jackie discovers Cefin’s body face-down in shallow mud, appearing to have drowned. Local police quickly rule it an accident—Cefin skipped school to play near the marsh and was caught by the tide. But Jackie’s old instincts kick in: she notices suspicious bruises on his neck, clothes not fully soaked as expected, and a small item clutched in his hand—an old bracelet identical to one worn by her missing niece Nessa.

This discovery revives Jackie’s buried trauma. Convinced Cefin’s death is linked to Nessa’s cold case, she begins her own investigation, reviewing old files and questioning parents and neighbors. The tight-knit community stirs with rumors and suspicion. Cefin’s grieving family blames Jackie for not watching him closely enough as his teacher.

To handle the official inquiry, police send back Detective Eric Bull (Rafe Spall)—Jackie’s former colleague and ex-lover. Years ago, they were a perfect team, solving cases together, but Nessa’s disappearance tore them apart: Eric believed Jackie was withholding information, while she blamed him for not shielding her from internal accusations. Their reunion is tense, laced with unresolved feelings. Eric initially dismisses Jackie’s theories as obsession, but new evidence—a witness seeing Cefin with a stranger—forces him to reconsider murder.

As the storm intensifies, cutting off roads with flooding and isolating the town, Jackie and Eric race against time. They uncover Morfa Halen’s hidden darkness: child abuse cover-ups, smuggling via sea routes, and a code of silence protecting locals. An elderly fisherman (played by Jonathan Pryce), a longtime friend of Jackie’s father who knows the marshes intimately, holds key secrets—he witnessed something three years ago but stayed silent out of fear.

Interwoven flashbacks reveal the Nessa case: young, happy Jackie and Eric pursuing leads amid community stonewalling, and Nessa playing near the marsh before vanishing. Jackie blames herself for being too busy to pick her up that day.

The climax unfolds amid the raging storm: massive waves crash in, flooding the town. Jackie and Eric confront the true killer—a respected community member (possibly portrayed by Harry Lawtey or another cast member)—a serial pedophile who silenced Nessa and now Cefin after the boy stumbled on old secrets. In a harrowing sequence in the flooded marsh under torrential rain, Jackie nearly drowns, Eric saves her, and they subdue the perpetrator before evidence is washed away.

In the aftermath, as the storm clears, Morfa Halen begins to heal but is forever scarred. Jackie and Eric reconcile—not romantically, but acknowledging their shared history. Jackie stays to teach and help the community recover. The final scene: Jackie at the marsh at dawn, releasing the bracelet into the water as a farewell to Nessa and Cefin. The series ends on themes of buried secrets surfacing like the tide, community resilience amid environmental and human threats, personal redemption, and the impact of climate change (the encroaching sea as a metaphor for inescapable pasts).

Main Themes: Family secrets, hidden crimes in small communities, climate change’s encroachment, grief, and redemption.

Style: Atmospheric and cinematic, with stunning foggy marsh visuals, haunting storm sounds. Blends psychological thriller with human drama, reminiscent of Broadchurch or The Missing.