Holly and Carter fly through a hole in their classroom wall, wishing on a magic marble. They find themselves almost blasted to pieces by an evil Fractionator's wand, as they help a girl named Marbella to escape him. What secret does Marbella reveal to them? Who is the Fractionator, and what madness is he trying to cast upon the loveable town of Marbleland? Holly and Carter are not exactly itching to find out, after their bizarre walk along a clay marble path. When they are attacked by a giant pantry moth and end up in the Fractionator's castle, at the top of a turret as bait for his tomfoolery, they know it's time to go home. Maybe the hot, stuffy room through the hole in the wall, listening to their teacher giving boring lectures on number bonds, was not so bad after all. Will they ever escape this crazed land? What will become of them, and what will be the result of Holly's misguided wish?