When crop circles are discovered in Boyle, Martin goes UFO-hunting - and ends up telling the local media his donkey has been abducted by aliens. As the town council goes into crisis mode, fearing the gentle image they've created of Boyle will be destroyed, the council and church try to strong-arm Liam into suppressing his son's story. Will he side with Martin or the leaders of Boyle?

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'.

Grandad's childhood imaginary friend George Gershwin, a cool, piano-playing guy, turns up to fulfil his bucket list., Martin takes an unusual approach to his exam revision.