A body is discovered on the pier and the Hennessys and the Kielys are at war again. Meanwhile, Michael is hiding something and Sharon discovers some shocking information about a colleague.

A familiar face returns to the Kiely family, spelling trouble for the Gardaí. While Niamh tries to get the café ready for its opening, her father's actions weigh heavily on her mind, with a visit from landlord Patricia Hennessy increasing the tension.

A visit to the hospital causes heartbreak for Superintendent James McKay and his wife Claire. As McKay worries for the wellbeing of his wife, she remains defiant. Garda Sharon Cleere and Garda Angela Tyrell discover another crisis. There are arguments in the Kiely household while Bridget and her loyal son Keith continue to plot revenge. Katie and David Hennessy continue to sneak around but are caught out. As David covers their tracks, Katie discovers something more sinister.

Michael Hennessy's lies catch up with him but his mum, Patricia, is determined to protect him. Despite Katie's promise to get on with estranged mum Bridget, there is an explosive showdown. A surprise visitor to the house rocks the family causing Bridget and Keith to resort to violence. Garda Angela Tyrell and Sharon Cleere make a tough decision and Sharon must keep quiet, yet again.

A mystery woman causes trouble for Garda Sharon Cleere and her colleague, Paudge. As they investigate further, they discover something that could land them in hot water. Liam tries to maintain a professional relationship with cafe landlord Patricia Hennessy, but their rendezvous planned for Friday suggests personal issues are at stake too. Over at the Kiely household, sparks are flying as Katie tries to restore order to the family. Elsewhere, Bridget has her sights set on winning back ex-husband, Vincent, and she won't take no for an answer.

Katie hears some good news but there are still potential problems that could ruin her chances. Patricia is fuming over a financial issue at the pub and knows who is to blame. Vincent finally takes a stand against Bridget with Katie's help. There is trouble at the cafe which may not open on time. Sharon begins to piece things together about McGonigle and her worst fears are confirmed.

Patricia Hennessy suspects Katie Kiely took the money from the pub and reports her to the Gardaí, but when questioned Katie insists she is not the culprit. Sharon shows partner Paudge the CCTV footage of Brian kissing a schoolgirl in his car but he wants nothing to do with it. As Paudge turns a blind eye, Sharon is uncertain what action to take.

Sharon finally confronts Brian with the CCTV footage of him kissing a schoolgirl but he denies everything and has an explanation for what she has seen. Michael Hennessy puts pressure on his brother David to end his relationship with Katie. David reluctantly agrees to end their love affair, but will he be able to stay away? A frustrated Paudge is forced to buy back his tenant Tony's debt.

As Bridget bags up Darren's belongings, grief overwhelms her, but a shocking discovery leaves her stunned. Back at the station, Brian unsettles Sharon when he suggests 'sticking together'. Problems continue at the Neptune cafe and Liam goes to sort things out with Patricia. Sharon and Paudge encounter danger while on a call at a block of flats.

Bridget tells Patricia a few home truths in a showdown at the pub, leaving Patricia reeling. A fire is discovered in the flat and, following the drama, Angela is taken to hospital. Brian's sinister side is revealed when he crosses the line and takes his frustrations out on a suspect.

David deceives Patricia and plans to head away for the night with Katie, and McKay discovers he too has been lied to when he takes Claire to the hospital. Meanwhile, back at the station, Sean and Adrijan help a woman whose car has been stolen, but there is more to the case than meets the eye.

Patricia corners Michael and he has no choice but to start giving her answers. David is summoned home and the truth finally emerges about the night of Darren Kiely's death, so the trio make a pact to keep what they know a secret from everyone - including Claire.

Brian gets more than be bargained for when he clashes with a local teenage tearaway who accuses him of police brutality, and Sharon makes a sickening discovery about the officer's private life. Meanwhile, Patricia Hennessy decides she has had enough of David's lies, and tells him to end his relationship with Katie Kiely.

Brian launches a ruthless campaign to save himself when faced with a garda investigation into his conduct, but he is blindsided by Sharon, who reveals that she knows he is still in a relationship with a schoolgirl and demands he put an end to it. Meanwhile, Angela's son Conor spots his father kissing another woman and a row ensues.

Sharon finally confronts Rachel about her relationship with Brian and urges her to tell her dad what is going on, but the schoolgirl pretends to be shocked at the allegations and denies everything.

Brian is determined to put a stop to Sharon's interference and arranges for them to be on patrol in the car together. However, things turn dangerous when they investigate a break-in at a warehouse, and it soon becomes all too clear that he had planned the whole thing.

Patricia and Claire discuss Michael's future with him in an attempt to prepare him for what may lie ahead, and he gets himself into more trouble after a few drinks with David. Meanwhile, Sharon receives an unwelcome visitor at the hospital.

Sharon attempts to summon the courage to tell the truth about her attack, but she begins to consider transferring to another station. Tommy accuses Angela of spending too much time at work, while Adrijan and Sean get to the bottom of a case with a missing girl.

Sharon returns to work to a hero's welcome, but Brian is as determined as ever to see her off his patch and steps the harassment up a notch. Meanwhile, a cry for help from a man in the cells goes unheard as the Gardai tackle a boisterous stag party.

Darkness hangs over the garda station following the death of one of the inmates who was being held in the cell and Sergeant Brian McGonigle, Adrijan and Sean are all questioned by the ombudsman over the fatal events. Meanwhile, Sharon is still struggling at work and is threatened once more by a persistent Brian as her refusal to request a transfer has incensed him.

Sharon becomes the first person to stand up to Brian when she refuses to give in to his tyrannical behaviour. Michael is furious to learn David is plotting to head to Australia with Katie, and back at the station, Sean remains rattled after the recent death in custody.

Thanks to Michael's big mouth, Katie finally finds out the truth about how David was being blackmailed by her brother in a discovery that leads to a revelation over David's involvement in the tragedy. Meanwhile, Brian steps up his vendetta against Sharon, who fights back. Despite learning that the death in custody was caused by a heart attack, the gardai aren't out of the woods yet.

Sean and Adrijan discover an abandoned baby by the road, Katie's revelations shock the Kielys, and Brian sabotages Sharon's plans to go home for her father's 60th birthday. Patricia is left red-faced when Niamh intercepts a suggestive phone call.

The Hennessy brothers face the full force of the gardai as both David and Michael are called in for questioning following Katie's damning statement regarding Darren's death. Meanwhile, Sharon struggles on after a troublesome criminal gives her a beating at work, and there are more shocks in store as Bridget is forced to confess to stealing her dead son's blackmail money.

Michael is taken into custody, and despite his brother-in-law McKay's words of encouragement to stand tall, he finds himself paralysed by fear. Meanwhile, this latest development in the long-standing feud leaves the Kielys overjoyed at the prospect of justice being served. Back at the station, the gardai are given the task of scattering an expat's ashes, and Angela is shocked when she uncovers the dead man's identity.