A plane crashes in the ocean with two men trapped inside and Flipper is the only one who knows where they are. Fortunately the plane is sealed tight so no water is inside, but how much air do they have left?
While checking on a poaching complaint, Porter is injured and captured by an alligator poacher and taken to his camp. When he's late for a camping trip with his sons, they worry and contact the coast guard.
While the boys wait on word from the Coast Guard on the whereabouts for their father and Flipper continues to search the ocean for the missing father, Porter tries to find a way to escape and get home.
The animals are acting strangely and even Flipper is heading out to sea. The boys tell their father, but he blows them off. Still, they believe something bad is just about to happen. Will they figure out WHAT in time?
Sandy sends Flipper on an important mission to deliver something to Porter he needs to repair the plane so he can make it to an important meeting in time. Flipper has to make a few stops along the way.
Bud has an essay to write about whale-hunting. While thinking about it he goes to sleep in his skiff and has a strange dream. Before his eyes, Captain Peabody is about to harpoon the animal but the whale flips the skiff over.
An injured man out at sea has to jump ship when his boat catches on fire. He's able to get his dog off, but he floats away and when Porter and Sandy find him, the dog is no where to be found. But, Flipper is on the job.
In the aftermath of a hurricane, Flipper discovers a man unconscious in his boat and tows the boat to a beach. Porter rescues the obvious bank robber and takes him back to his home, unaware of who the stranger really is.
Porter's Aunt Martha has come to visit for the first time since Porter's wife died. She instantly decides to take over, and her first order of business is sending Flipper out to sea because she believes all wild animals can be dangerous.
Porter leaves Sandy and Bud in charge while he goes to take care of some business for the day. He even tells them that they can open his mail when it comes. They do as instructed, only to find a check that says "termination pay" on it. Bud and Sandy are distressed about having to leave Coral Key, so they set out to find their father a job. You wouldn't think they could get into any trouble but...
Sandy and Bud took a short cut on the way to their errand and end up in the middle of an active shooting range. While they are stuck there being shot at after their motor is struck, Porter Ricks desperately looks for his boys, then tries to save them from being killed.