The town prepares for the annual horse race on the beach – only to discover that a prize-winning racehorse has been stolen. As the investigation gets underway, Finn is getting used to having both his birth parents in his life. But any positive feelings are short-lived. Faced with a desperate personal situation, Finn's father asks him to make a piece of evidence disappear. Finn is sympathetic but refuses to compromise himself.

When Aidan Hunter's brand-new boat is stolen, Inspector Finn takes an active interest in the case. Aidan is bemused by the special treatment, little knowing that Finn's ulterior motive is to find out just what sort of man Aidan really is. When the boat thieves are finally arrested, Aidan is unexpectedly magnanimous and forgiving. This gives Finn all the answers he needs – leading him to make a life-changing decision.

A new taxi business has opened in Port Devine. When one of the cars is destroyed in an arson attack, Finn is worried by the fact that the owner's father has an extensive criminal record. Is this some sort of revenge attack? And does it mean that organised crime is moving into the sleepy seaside town in the guise of Aidan Hunter?

When rookie cop Ryan discovers a burglary at his brother's house, he calls in Marlene for help. Marlene is sure there's something funny going on – and she's proved right when Ryan's brother admits that there was no burglary, he was in the process of leaving his wife. As Ryan discovers what has really been going on in his brother's seemingly happy marriage, he's forced to reconsider the way he's been treating his girlfriend Niamh – and to make a momentous decision.

Detective Jo has been following orders and staying away from Louise Halbridge – until Louise's son turns up in Port Devine with a gun. When Louise grabs her son and skips town, Jo is sure that she's finally going to be able to prove that Louise is a killer. But events don't turn out as the detective is expecting.

When Siobhan's car is stolen, Marlene spearheads the investigation – despite the fact she's got the day off to get married. Is the bride-to-be just suffering from pre-wedding nerves or is she realising that she's made a terrible mistake?

Marlene's uncle Barry is also stressed out. He's worried the church authorities will find out he's officiating at an unauthorized same-sex wedding blessing. Little does he know that Nicole has invited the bishop.

When a new landowner threatens to cut down Port Devine's much-loved ‘Raggedy Tree', her plans are met with vandalism, burglary and a protest – in the form of Niamh and Ash chaining themselves to the tree.

As Callum and Jo investigate whether a stag do prank has gone tragically wrong, Jo faces a heart-breaking decision. Clint storms out, driving Nicole into the arms of another.

When a dementia patient goes missing, the officers find themselves uncovering a tale of shipmates and stolen treasure. Callum discovers the real reason Jo came to Port Devine.

Concepta is back in town, determined to ignore the fact that she's not Finn's birth mother – and carry on like nothing has changed. Will Finn be able to live with that?

When a house is burgled during the owner's funeral, the police soon identify a suspect. Their identity will rock Port Devine to its foundations.

Shay survives a near miss with a maverick motorcyclist which leads the police officers into an investigation involving a bag of cannabis, a champion boxer and the northern lights.

Nicole's not pleased when Clint's dodgy brother Sly arrives in Port Devine, determined to get their country & western band back together. Marlene makes a life-changing decision.

With the pub a smoking ruin, Clint suspects that the fire-starter is someone close to home. Meanwhile things between Callum and new detective Jo get hot and heavy.

Police Inspector Finn's world is blown apart when he finds out that Concepta has a secret.