Blowing a giant bubble with his never-popping gum, Alvin floats into the air above the clouds. When he lands, he finds himself in a strange land where everything is gray. The trees, animals, and even people are all gray.
He soon learns that the evil goblins from beyond the Shadow Mountains have kidnapped the twin princesses and stolen all of the color from the land.
With his new friends Permy the squirrel and Ronaldo the mouse, Alvin must battle man-eating plants, outsmart the bumbling Crimson Guards, cross the Sugar Desert, overcome the two-headed dragon, and learn the value of eating your vegetables to rescue the princesses and restore color to the kingdom.