The girls have a stopover in Singapore on their way from Japan to Fremantle. They decide to spend their time sightseeing, but Yuzuki notices Hinata acting strangely.

Expedition member Toshio confesses his love for Gin, and asks if Shirase knows anything that might help him get closer to her. Shirase tells him that Gin was just a friend of her mother's, so the girls insist that Shirase go to talk to Gin herself.

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.