After a volcanic eruption causes floods, members of the moomin family find refuge inside a floating theater.
Narrator / Muumipappa (voice)
Muumimamma (voice)
Muumipeikko (voice)
Niiskuneiti / Miska (voice)
Nuuskamuikkunen (voice)
Pikku Myy (voice)
Homssu (voice)
Puistovahti (voice)
Mymmelin tytär / Vahdin serkku (voice)
Vilijonkka / Emma (voice)