With Dessie, Fidelma and baby Rose back living with the Moones, the choirmaster sets to work on a new business to help him give his family their own home. But does Boyle really need a Catholic book shop? Liam isn't convinced, and starts building an extension in the garden instead, while Martin has his own building project - renovating his new 'penthouse'.
Sean is the imaginary friend of 12-year-old Martin Moone, the youngest child of a family living in a small town in Ireland. Martin has a unique perspective on life aided by an imaginary friend.
His imagination comes into play both in his childish drawings, which come alive through animation, and in the ridiculous schemes he comes up with, against Sean's better judgement. With Sean's help, Martin negotiates life as the youngest in a chaotic, scatter-brained family.
Moone Boy - Bells 'n' Smells Synopsis and Schedule