Fenton the Frog is the tiniest frog on earth and he's very smart. He has an idea to become a surgeon that can do operations inside the body. He is injected into the bloodstream and because of his tiny size he can roam about and fix what needs fixing. A Leather-back Turtle named Liddy comes in by ambulance - because of poor fishing habits she has, like many other sea creatures, swallowed a fish hook which is causing her a great deal of pain.
Fenton solves the problem only to be confronted by the oldest emotion in the world!