Baby Toby is found on a platform and adopted by train driver Mr. and Mrs. Track, growing into a railway whiz with heroic instincts. When crooks steal a goods train packed with loot, clever Toby sneaks aboard in a trunk to thwart their scheme and drive it home. Amstutz's dynamic illustrations chug with Ahlberg's rhythmic humor, a rollicking Happy Families romp on pluck and family rails.