獨居在都柏林的失婚女子Magaret，得知她青少年兒子的死訊。她私自承受內心的不安與悲傷，每天都會前往當地的游泳池。有一天，她在游泳池遇見了Joe，之前她在工作地點的後巷，曾碰到受傷而無家可歸的他。Magaret把家裡一個房間讓給Joe住，兩人發展出一段不尋常的關係，此時，Magaret的前夫Matt開始不定期出現在她的生活裡。Magaret和Joe對彼此的依賴日益加深，但喪子而悲憤的Matt，以及Joe所捲入的青少年幫派，讓兩人剛建立的信任關係備受威脅。
Margaret, a divorced woman living alone in Dublin, learns that her teenage son has been found dead. Enduring her unsettling grief privately, she escapes daily to the local swimming pool. One day at the pool she runs into Joe, a homeless youth she found injured late one night in the deserted laneway behind her work. Margaret offers Joe a room in her house and an unorthodox relationship starts to develop between them. Margaret’s ex-husband Matt begins to turn up randomly in Margaret’s life. As Margaret and Joe’s mutual reliance grows their tentative trust is threatened by the escalation of Matt’s grieving rage and Joe’s involvement with a gang of violent youths.
