In England in 1940, shipyard worker Joe Maddison felt depressed and past his prime because he was too old to serve in World War II. Shocked when his wife leaves him for a sailor, Joe and his friend Harry decide they need a new challenge and volunteer to join the Home Guard which is headed by local pharmacist Mr. Simpson. This decision will lead Joe on a journey of self-discovery, involving lessons in friendship, bravery, and love.