Night after night, children from all around the world are being kidnapped. What evil is hidding behind such thing? Strange melody making children run from their homes to the world of sweet dreams sounds in Tokyo and Sailor Soldiers are investigating the matter. What is worse, Chibi-Usa is enchanted by the melody as well.
For what purpose do someone kidnap and gather all these children? Does it present a threat to the Earth? Will Sailor Soldiers be able to stop this evil-doing and save the world and children? Will Usagi save Chibi-Usa from the clutches of evil?