Build a movie plot around this: Why did Kay's family take shelter? air raid
A:
Kay Miniver (Greer Garson) and her family live a comfortable life at a house called 'Starlings' in Belham, a fictional village outside London. The house has a large garden, with a private landing stage on the River Thames at which is moored a motorboat belonging to her devoted husband Clem (Walter Pidgeon), a successful architect. They have three children: the youngsters Toby (Christopher Severn) and Judy (Clare Sandars) and an older son Vin (Richard Ney) a student at Oxford University. They have live-in staff: Gladys (Brenda Forbes) the housemaid and Ada (Marie De Becker) the cook.As World War II looms, Vin returns from the university and meets Carol Beldon (Teresa Wright), granddaughter of Lady Beldon (Dame May Whitty) from nearby Beldon Hall. Despite initial disagreementsmainly contrasting Vin's idealistic attitude to class differences with Carol's practical altruismthey fall in love. Vin proposes to Carol in front of his family at home, after his younger brother prods him to give a less romantic but more honest proposal. As the war comes closer to home, Vin feels he must "do his bit" and enlists in the Royal Air Force, qualifying as a fighter pilot. He is posted to a base near to his parents' home and is able to signal his safe return from operations to his parents by cutting his engines briefly as he flies over the house. Together with other boat owners, Clem volunteers to take his motorboat to assist in the Dunkirk evacuation.Early one morning, Kay unable to sleep as Clem is still away, wanders down to the landing stage. She is startled to discover a wounded German pilot (Helmut Dantine) hiding in her garden, and he takes her at gunpoint. Demanding food and a coat, the pilot aggressively asserts that the Third Reich will mercilessly overcome its enemies. She feeds him, calmly disarms him when he collapses, and then calls the police. Soon after, Clem returns home, exhausted, from Dunkirk.Lady Beldon visits Kay to try and convince her to talk Vin out of marrying Carol on account of her...