The Prentices are a middle-aged, middle-class couple who enjoy doing exactly what they want, pleasing no-one but themselves. Golden retirement dreams are shattered when the couple take on their three orphaned grandchildren. Maggie (Penelope Keith) and Andrew (William Gaunt) are now looking forward to an idyllic retirement at their new French vineyard. But after their estranged son Graham and his wife 'Bootface' get killed in a car crash, they're left to bring up their grandchildren. No great lovers of children at the best of times, they're forced to abandon their dreams and accept the nightmare of parenting three ungrateful, fussy and stroppy kids, aged 13, 11 and 7! One's a vegetarian, one only eats Spam and one won't eat anything that's round. As the days turn into months, it begins to dawn on Maggie and Andrew that the three monsters - and their multitude of pets - are there to stay. Will the reluctant grandparents gracefully take on their family duties as next of kin?