Engines are reving up in Florida. The Planeteers run into Tank Fletcher The 3rd, who is guarding a boat. Wheeler comes up with a plan to get past Tank. He and Ma-Ti use different desguises to get on the ship. Meanwhile the other Planeteers met Danny and Belinda on a shore line. Wheeler and Ma-Ti meet Danny and Belinda, and they join forces to save the manatees. But Hoggish Greedly is behind a plot to get rid of the manatees, and the Planeteers have to act fast. Kwame and Ma-Ti are kidnapped by Greedly. Wheeler falls off of the boat, and into the water. Belinda saves Wheeler with mouth to mouth. Wheeler wakes up in his hotel room and discovers that he is really dressed as undercover for a plan to rescue Kwame and Ma-Ti.
After rescuing their friends, the Planeteers set off to chase Greedly with Wheeler at the wheel. Greedly is about to hit the manatees. Kwame says "Let our powers combine!" and they call Captain Planet fast, who saves the manatees. Planet also stops Greedly as well. As the drivers are about to hit the manatees, Planet creates a huge water, and saves the drivers. He grabs Tank and throws him into the water. Then grabbing the tree, Planet turns the tree into boat sticks to get them back to the marina.
This was the last show of the series.