Ever since her mother was lost in Antarctica, Shirase has felt like she was lost in a terrible dream. Despite her fear of what will happen if nothing changes after she goes, she and her friends now set off on their final journey to the place where her mother was lost.
It's an optical illusion 
caused by ice crystals.
.إنّه وهم بصريّ تتسبّب به بلّورات الجليد
Ein durch Eiskristalle verursachtes
optisches Phänomen.
Una ilusión óptica
causada por cristales de hielo.
Una ilusión óptica
causada por cristales de hielo.
C’est un phénomène optique
dû aux cristaux de glace.
È un effetto ottico dato dalla luce
che si riflette sui cristalli di ghiaccio.
É uma ilusão ótica causada
pelos cristais de gelo.
Оптическое явление, которое
вызывается кристаллами льда.