Blaketon is back in Aidensfield following his time away and immediately finds himself embroiled into a dangerous investigation when Lord Ashfordly calls on his P.I. services when explosives go missing from the local quarry ahead of a Defence Minister's official visit, causing tensions to boil over and putting the former sergeant in mortal peril when he crosses swords with a deadly new foe. Meanwhile, Vernon, Bernie, David and Dr Alway become bell ringers at the local church, but they soon upset a local man when their practice sessions interfere with the sale of his cottage.

Jenny is delighted when her younger brother Steve pays a visit, but her excitement soon turns to despair when she notices what the local vicar is growing in his greenhouse after she secures Steve a job. Although she agrees to keep quiet, her troublesome sibling seeks to exploit the situation for his own gain, threatening his put-upon sister's relationship with Merton. Meanwhile, a gang of Mods begin causing havoc in the village and gain an unlikely new recruit - David!