As key World leaders come together under one roof to discuss how to best prevent the growing spread of pollution and o-zone damage worldwide, Zarm returns to earth with a plot to snuff out the Planeteers. Calling a meeting of all the eco-warriors greatest foes, Zarm is able to tap into earth's energies and drain the earth itself of all it's resources. Only Gaia stands in his way, but Zarm has a final surprise to ensure she does not become a problem..

Zarm, having disabled Gaia and re-taken his position as spirit of the earth, begins turning the world into little more than a dead husk. With Gaia reduced to an old woman with not much longer to live, the Planeteers and Captain Planet face their greatest threat yet...

The Planeteers travel to the Northwest after hearing about an old growth forest which is, literally, disappearing into thin air. After Wheeler goes off to investigate with a pretty local teenage bird watcher, Linka spots a "flying saucer" but Kwame recognizes the pilot . . . Hoggish Greedly! They discover Greedly's scam - "Sucking up" 500-year-old trees to make pressed board furniture. Outraged, they try to stop him, but his "Tree Trasher" may be too much for them.