Four cheetahs are detained on their way from South Africa to Russia. Despite their ingenuity and best efforts the staff cannot find two of the cheetah's identifying microchips and they have to prepare for the big cats' extended stay. Animal Health Inspector Sharon is called to an illegal bulldog, which has been brought into the UK from Eastern Europe without the correct vaccinations. His owners cannot afford to pay his quarantine and he may have to be destroyed. Animal Health officers Stuart and Chris take on the resident grumpy African Dwarf Crocodile, in an attempt to clean out its cage.