It's winter and the Pinker family are all out of shape - so Dad decides to use the whole family to test out his ideas for his new diet and exercise book. But after a few weeks of his intensive regime of early morning runs and nutritionally balanced ready meals (and double helpings of school pudding to make up), Peony can barely walk up a hill. And she's supposed to be climbing Mount Snowdon soon! Can Gran get the family back on track with some wise words and common sense? Hilarious family comedy with a self-help twist.