本片讲述了四个伦敦公交公司修理工驾驶一辆双层大巴环游欧洲的故事。
Cyril: [singing] There's something nasty round the bend! Don: [very fast] You know I wouldn't be surprised / That gasket hood looks pulverized / The shock recoil is now reversed / At first you'd boil and then you'd burst / Compression seep will soon distend / The leak that leaks in your big end / The lousy coke has got a hitch around the choke adjustment switch / Your piston spout is dynamite / In cutting out the parking light / And, from its shake, your outside brake is needing a new drum! Don, Cyril, Steve, Edwin: [slower] In fact make no mistake, you've really had it chum! Don, Cyril, Steve, Edwin: [singing] For as guys we're really qualified / There's no need to look terrified / For when you have tried, you will say "wide-eyed", we are just what the doctor specified / We are pleading please let us take you for a ride with us! / Ride with us! [short music break in which the car backfires leaving everyone with black faces] Don, Cyril, Steve, Edwin: Please let us take you for a ride!