When Detective Chief Inspector Tom Mathias arrived in Aberystwyth after ten years at the London Met, he was a man on a journey to recovery, a man cast into a wilderness of his own making. Flawed but brilliant, Mathias has faced death and carries the scars to show it. He may not be able to bring back the dead, but he is compelled to find justice for the living – but can he let go of his own demons? With the revelation at the end of the last episode that he had been there when his own child drowned, and with his wife, Meg, arriving in the town by the sea - what does that mean to Mathias?
Everyone has his own burden to carry and after years of juggling a successful career with the police and bringing up her daughter, it's time for Mared Rhys to take stock of her life. Mared is young to have risen so quickly through the ranks, but she’s earned it – a combination of hard work and natural talent. She’s intelligent, perceptive and independent, she loves what she does and she gets results. But has success come at the expense of her personal life?
Detective Constable Lloyd Elis is a local boy, the son of a farmer. Good looking but socially awkward, he may be useless with women but he has a talent for numbers and a passion for the job and often sees clues in the paper work that others would’ve missed.
Detective Sergeant Siân Owens is impulsive, determined and ruthless. She does whatever it takes to get the job done. Sensitivity may not be her strong point, but she shrugs off any criticism, and her motto is ‘no regrets’.
A complex, enigmatic figure, Chief Superintendent Brian Prosser is embroiled deep within the upper echelons of the Aberystwyth elite and keeps a keen eye on all the goings-on in the police station. He understands the risk of introducing Mathias into this community and it could ruffle the feathers of some of his oldest friends – but why has he taken that risk in the first place?