Jock and Siobhán’s daughter Star is turning six and a birthday party is being organised. Orla Walsh however is having her kitchen redone, and asks Mairéad to host the party.

Six-year-old Star accidentally discovers the Billy Murphy mask, infuriating Sgt Healy. Conor and Jock’s genius plan to help Jock and Star have a video call is rumbled by Linda.

Conor and Jock have grown older, but not any wiser. A madcap trip sees them on the wrong side of the law as they’re given a free holiday to Colombia from a Spanish-speaking fella.

Conor is becoming an increasing nuisance in Healy and Mairéad’s house, and when Healy shares that he’s going on a fishing trip to where he grew up, Mairead insists he bring Connor.

Conor takes on a job in the fishmongers, still desperate to get back with his former flame Linda. Conor’s arch-enemy, Gavin Madigan, continues to taunt him.

There’s a new Fake Billy Murphy in town, and he steals Conor’s most prized possession – the engraved lighter given to him by his best friend Jock.