To get on a ship to Antarctica, Kimari and Shirase will first need the money to fly from Japan to Fremantle, Australia. To earn this money, Kimari gets a job at a convenience store, where she meets a girl named Hinata Miyake. Hinata decides to join them on the trip, and quickly gets swept up in Shirase's next plan...

After arriving in Fremantle, the girls get a tour of their icebreaker ship. When Gin mentions that their new room was where Shirase's mother once stayed, the girls check to see if she might have left something behind there...

The ship sets out from Fremantle, heading for Antarctica. The girls interview crew members, peel potatoes, and get training to improve their stamina. But as exhausted as they are already, an even greater disaster awaits them!

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.