Johnny Boo is the best little ghost in the whole world, because he's got Boo Power. This means that he can go BOO really loudly. His pet ghost, Squiggle, has Squiggle Power, which means that he can fly and do really fast loop-the-loops. Together they have the world's greatest ghost adventures! When the giant pink and yellow Ice Cream Monster bumbles into their lives, they go into a mad panic... until they discover that he's actually quite friendly.