Ten years ago, after losing contact with Scrooge during her flight, Della crash-lands on the moon. Now with a robotic leg and Gyro’s Oxy-Chew gum – which provides oxygen, water, and nutrients – Della works feverishly to get back to Earth and her sons. However, her efforts are hindered by a giant metal eating moon mite, and her ship needing gold as fuel. By the present, Della still has not found any gold, but she meets two aliens, Moonlanders named Gen. Lunaris and Lt. Penumbra. Following this, she befriends the mite, which turns out to be a mother finding food for her child. As Della prepares to accept her fate of being stranded on the moon, she is invited to the aliens’ hidden city, Tranquility. Seeing that the city has gold, Della finds herself one step closer to getting home.