World War I gets the musical treatment in a series of a song-and-dance vignettes. Throughout it follows the Smith family -- stand-ins for the British working class -- who initially view the war with sunny optimism. But after the Smith boys -- Jack (Malcolm McFee), Freddie , Harry (Maurice Roëves) and George (Paul Shelley) -- witness the reality of trench warfare, their illusions are shattered, and the best they can hope for is survival.