Ami is left alone to protect Earth while her partner, space detective Gulliver, attends the Galactic Peace Conference. However, the evil organization Buuma seizes this opportunity to target her, preparing to launch their assassination plan. As foot soldiers attack Ami, Commander Hella drags her into the alternate dimension known as Buuma Zone, cornering her relentlessly. Though Ami has overcome countless crises before, her resolve remains unshaken—despite capture and torture, she refuses to reveal her base's secrets. After escaping imprisonment, she's ambushed again by Buuma's new assassin, the monster Gabugabu. With her life in imminent danger, the path to escape becomes critical—Ami's fate hangs in the balance.