AXEL WALKER, the crazy TRICKSTER, likes toys and gimmicks. And this time he s making mischief using things no one can see. Whether it s oxygen, air pressure, or invisible gas, the TRICKSTER is bubbling over with evil schemes. Only the FLASH can outwit the nefarious knave. But soon, WALKER traps FLASH within a special bubble, a gigantic glass sphere free of friction. Without friction enabling him to move, the FLASH s super-speed doesn t get him anywhere. And the oxygen inside the bubble is quickly running out "