On her way to the park, Momo drops the precious bell her mother gave her. Meanwhile, Tama is bothered by the fact that Momo hasn't arrived yet, so he goes looking for her and hears the sound of Momo's bell coming from the drains...

Tama looks up at a sky where fluffy clouds float by as they always do. Where do clouds come from? Tora leads Tama and the others to the place clouds come from, and that place is...
I heard the sound of Momo-chan's 
bell come from here.
.سمعت صوت جرس مومو-تشان من هنا
Ich konnte Momos Glöckchen
von da unten hören.
El sonido de su cascabel viene de aquí.
El sonido de su cascabel viene de aquí.
J’ai entendu le son
de la clochette de Momo.
Ho sentito il suono del suo campanellino
venire da lì.
Я слышал оттуда звон колокольчика Момо.