Around the world, children are disappearing - and the culprits are not of this world! The evil Queen Badianier plots to trap Earth in a dark energy field called the Black Dream Hole, powered by the sweet, sugar energy produced from the dreams of children. Meanwhile, Chibi-Usa befriends Perle, a new kid who seems to have grown fond of the town's warm and friendly atmosphere. Their peace is short lived when the the town's children, including Chibi-Usa, suddenly start sleep-walking out of their homes! Sailor Moon, Perle, and the Sailor Guardians must now fight to save the lost children before the enemy can place the world into an eternal sleep that's definitely not sweet!