There is a little girl in a cargo train driving through the night: The orphan Momo, who is looking for a new home. As a conductor become suspicious and stops the train, Momo has to jump off. She meets the little turtle Cassiopeia, who is accompanying Momo from now on. Together, the two find a small cozy town in which they immediately make the acquaintance of Beppo The Sweeper. Beppo takes care of Momo and realizes that she has a special gift: Simply her presence enchants people and brings out the best in them. Only the mysterious gray gentlemen, who appear increasingly in the town, are unimpressed by Momo's gift and continue their dark business.