Keeping the environment safe from harm is tough work, but having a technologically eco-friendly car makes it a whole lot easier. Join 13-year old Julie Leeds and her futuristic car Jett as they travel to Key West to uncover why the coral reefs are dying. From close encounters with sharks, shipwrecks, and buried treasure, to menacing messages and ruthless treasure hunters, Julie's summer is a harrowing thrill ride that leads her to an infamous fort, where she learns of her own family's connection to a long-forgotten secret.