Yolanda Donlan is the eponymous "Lar" who arrives in Britain as part of a employee swap. She is to work in a factory and see whether or not she can impart any words of wisdom to the staff and the bosses about American working practices. After a while she becomes aware that the local council has eyes on their town. Citing it's "plumbing" as unsuitable for modern day living, they propose to buy up all the houses and relocate the hitherto villagers to a new town. Initially full of vim and vigour, they - led by her new love interest "Bob' (a rather lacklustre Michael Rennie) are gradually worn down...