Episode 1

When his ex-partner emigrates to Australia with their son and her new partner David, Joseph suffers a relapse of his alcoholism. Waking up hungover and distraught, he uses the last of his money to return to his hometown in Ireland and begins searching for answers about the troubled past he has repressed.

Episode 2

Joseph arrives in Ireland and reconnects with his sister Anna, who he has not seen since he ran away from an orphanage, aged 9. Anna's husband Michael gives Joseph work on a building site where he meets fellow labourer Craigy. Recognising Joseph from his brief time at the orphanage, he suggests they meet up, but Joseph is reluctant.

Episode 3

Joseph visits the orphanage but the vivid memories it brings to the surface turn him to alcohol once again. Waking up in the middle of the night he finds a connection with Michael's sister Dinah and the two begin to kiss. The pair are interrupted by Anna who gives them both a severe scolding and tells them to keep away from each other. The next morning Anna warns Joseph off Dinah, who she says is carrying a lot of baggage of her own. Craigy offers to help Joseph talk through the latter's experiences at the orphanage but, still unable to remember the details of his time there, Joseph reacts with suspicion and distaste to the idea, lashing out verbally at Craigy.

Dinah decides to try and reconnect with the baby she gave up for adoption when she was 15 and secures a meeting with the woman who managed the adoption process. She begins to write a letter to the boy, who she named Finn, explaining why she felt she had to give him away.

Episode 4

Joseph and Dinah begin to learn more about each other's past. Although initially determined not to act upon their feelings for each other, the temptation becomes too much. However, Joseph becomes nervous and then suffers a severe panic attack, resulting in him being admitted to hospital. The next morning, Joseph reveals to Anna that the panic attack was brought on by his realisation that he was raped at the orphanage by a teenage boy.

Dinah meets the woman who arranged Finn's adoption but is told that the boy's new family do not want her to re-enter his life. She tells her that the boy sent a number of letters and drawings to Dinah some years previously but was distraught when he did not receive any replies. Dinah insists that she never received any of the correspondence and tells the woman that they must been intercepted and destroyed by her mother, who did not wish to be reminded of her daughter's teenage pregnancy.

Joseph apologises to Craigy for lashing out and talks to him about the details of his childhood rape. Craigy tells Joseph that he had also been raped by the same teen at the orphanage, Damon, who later coerced Craigy into luring Joseph into being a new victim of his abuse. Joseph forgives Craigy but demands to know Damon's address. Dinah, in despair after learning the reasons behind being denied access to Finn, desperately tries to contact Michael but he does not answer her calls. In the absence of Michael's guidance, Dinah sets off to confront her mother at her home while Joseph pays a visit to Damon.

In the final scenes, Joseph finds Damon living in a run-down house, terminally ill. He seeks answers but Damon is unapologetic, citing his own childhood abuse at the hands of others. Joseph admits that he came to kill him but he now feels no need, as he can carry on living his life with his newfound family, while Damon will die alone in misery. Joseph clutches at him but then kisses him on the forehead and releases his hold, telling him that he forgives him, and then leaves. It is shown however that after reliving the abuse of the past, and his role in it, Craigy has hanged himself in his home.

Meanwhile, Dinah confronts her mother about her actions and they reveal their mutual hatred. Dinah's mother admits that she burned Finn's letters, feeling that showing them to Dinah would have needlessly brought back to the surface an issue that she had wanted to keep buried. After an intense argument, Dinah is overcome with rage and strangles her mother to death.