Callum discovers that his girlfriend has been telling him a pack of lies. Meanwhile, Finn faces the most difficult decision of his life.

When Pastor Gray reports his farmhand Donal missing, Marlene and Callum make a gruesome discovery in a slurry pit. Forensic evidence suggests that Donal's death was no accident, so the police officers ask his sister if she can think of anyone who might have wanted to harm her brother. She points the finger straight at Pastor Gray; her dead brother was gay and Pastor Gray is violently homophobic.

Ex-lovers Finn and Leila are thrown together again when his daughter Niamh goes missing. Finn is taken aback when Siobhan reveals that Niamh had an older boyfriend back in Belfast – has she gone to see him? The stakes are raised when Callum finds CCTV of Niamh being taken away in a van on the way home from her friend Joanne's house.

When his wife's former lover is arrested for assault, Finn can't hide his jealous feelings – which makes Leila wonder if she's made a terrible mistake.

Former Judge Ginette Prince sent a lot of dangerous people to prison in her time so, when someone sets fire to her home, the police officers wonder if the motive is revenge. However, Ginette's been retired for years and the criminals she put away are no longer a threat, so vengeance seems unlikely.

It's Clint and Nicole's wedding day, but best man Finn and bridesmaid Leila are busy investigating the theft of some much loved ‘therapy sheep'. Finn's 15-year-old daughter Niamh is back for the wedding. Now that she lives in Belfast with her mum, Niamh dismisses Port Devine as boring – until she breaks down and admits to Leila that she really wants to come home.

Leila is horrified that her ‘old friend' Rafid has turned up in Port Devine, but she paints on a smile and greets him with open arms. Like everyone else, a jealous Callum assumes Rafid is Leila's ex-boyfriend from England. Rafid's all smiles with the locals, but he's edgy and bitter with Leila. Has he come to Port Devine for some sort of revenge? Finn is worried that Marlene's snooping into Leila's past may have blown her cover, so he's alarmed when he discovers that mysterious Rafid has turned up.

As Leila waits to hear if Callum has blown her cover, taxi-driver Barry drives into a young woman who flees the scene of the accident. Barry's bad day gets worse when Concepta spreads rumours about his ‘dangerous driving'.

When a burglar claims he saw a dead woman in a farmhouse, Leila and Finn call on elderly couple Gerard and Brenda Smith. Gerard claims Brenda is abroad, but Leila smells a rat. Finn warns Leila to tread carefully; being heavy handed with a well-loved neighbour could alienate the locals.

The sudden arrival of new Detective Constable Leila Hussain sets local tongues wagging – what brings this big city girl to the sleepy seaside town of Port Devine? It's clear that handsome duty inspector Finn O'Hare knows – and that Leila is fleeing serious danger in England. It's also clear that Finn and Leila will struggle to hide the truth from Finn's nosey but well-meaning mother Concepta and seasoned Sergeant Marlene.