The evil alien, Brainiac, has Power Girl under his control, thanks to a devious device planted on her skull. Her thoughts become twisted as her body undergoes various changes, increasing her strength and inflaming her lust. Now she’s hell-bent on destroying Supergirl completely. The crazed Kryptonian lass knocks out her beloved ally until Supergirl crumples to the ground. Power Girl binds the incapacitated heroine with Kryptonite rope to an ancient coffin.