In the 1980s schoolboy Joe loves hearing his grandpa's tales of his time as a Battle of Britain Spitfire pilot but with the onset of Alzheimers Joe's parents put the old man into Twilight Towers retirement home run by the sadistic Miss Dandy. When the family gets to visit Grandpa Joe is shocked at his treatment, also discovering Miss Dandy's plan to swindle the residents. So, helped by his sister and her boyfriend, Joe sets out to spring Grandpa, who insists on bringing the other old people with him. They succeed but Joe comes to see that Grandpa's condition has worsened and takes him for one last ride in a Spitfire - before Miss Dandy is finally brought to justice.