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!