Little did brothers Joey and Bobby Johnson know that their plans to go fishing to celebrate the first day of their summer vacation would take them on an environmental adventure they'd never forget. Finding their neighborhood pond covered with green muck and dead fish, the brothers set out to "do something" about it. That leads to a close encounter with a manatee, an up-close tour of a center that rehabilitates injured sea turtles, and the creation of "The Greenies". Join Joey, Bobby and their kid sister Katy as they discover even kids can protect our environment -- and have fun while doing it!