Howard and Vince, two workers in a run-down zoo, are often called upon to put their jobs before their pride. That means dressing up as animals and sitting in cages because their boss, American entrepreneur Bob Fossil, can't afford any real animals. Vince accepts the situation happily, quite in contrast to his grandiose, tweed-wearing colleague. But their jobs involve much more than just dressing up. From battling mutant animals engineered in a secret laboratory underneath the zoo, to fighting a kangaroo to raise money for their dilapidated workplace, Howard and Vince always find themselves at the centre of some very strange events.