Celebration is in the air as St Patrick's Day dawns, but the Moones are having a different kind of party today: Fidelma's wedding.

Liam and Debra abandon the kids for a romantic break to celebrate their 20th anniversary - but it all threatens to fall apart after a chance encounter with Liam's old flame. Meanwhile, Martin and Padraic are in Dublin, where they soon discover new talents.

Padraic finds himself caught in the middle of his warring parents and decides to escape his troubles, leading his worried mum and dad to raise the alarm following his disappearance. Unaware of the chaos he is causing, the lad embarks on a life of crime with the help of Martin. Meanwhile, Crunchie's friends stage an intervention after he resorts to drowning his sorrows.