 The Tube Empire sends Princess Ial as  Mio  to survey the surface world. Mio then falls in love with Formula 1 racer Takeru, which is a no-no for the Tube. As punishment, Ial/Mio is imprisoned in a block of ice. Takeru, determined to find Mio, Takeru then joins Maskman, a group of martial artists who use  Aura Power  under Commander Sugata s leadership against the Tube.