Arielle Lane is the latest UltraGirl to go up against the Dark Phantom. Hearing of a string of robberies, Arielle opens her shirt to reveal her UltraGirl costume. Finding the stolen goods, she is grabbed by a masked man rendering her helpless. She is awakened to find herself well bound with dark energy straps, rendering her powerless. The masked man leaves her to report to his boss about her capture. The boss arrives, revealing him to be the Dark Phantom, and how he has laid out the thefts to capture her. He also sets up his dark energy generator to make her turn into his evil minion. Using a mouth-filling gag to silence her, she is hogtied on the table to keep her in place to allow the dark energy engulf her. Will she escape from this fiendish plot? Or will she succumb to the dark energy and become Dark UltraGirl?