Doctor Lion of the animal clinic on wheels is a great, kind doctor who understands the feelings and thoughts of the animals he treats. While he’s in town, the Ham-Hams take a special liking to the hard-working Doctor Lion. They decide to help him out by cleaning up the clinic for him. But woe are the Ham-Hams, when at the end of the night, due to a foul occurrence, the clinic is even dirtier than when they began! Now Doctor Lion has to do even more work!