8-year-old Hiyori, who lost her parents, and Yui, seeking to escape her violent father, got off at a Kitsunezaki station one day. The great earthquake and tsunami had changed their destinies. Their lives were saved, but they were perplexed when asked about their identities at an evacuation site. It was an old woman named Kiwa Yamana who lent them a helping hand. From that day, Yurie was known as Yui, Moeka as Hiyori, and together with Kiwa, the three women began a wonderful communal life together at the old house "Mayoiga" overlooking the sea.

Obata Yousuke lives on Pagopago in the Fiji archipelago with his father Tetsuo, a specialist in oceanographic biology. After a storm strikes the island, Yousuke rides to the lagoon with his Jet Ski and finds a strange baby dinosaur there. He takes it to his father's laboratory and names it Coo. Coo grows and seems to be a large marine reptile (a baby plesiosaur) which lived there some 65 million years ago. But Coo soon becomes an object of interest for the French secret service, assigned to protect the nuclear interests of France in that otherwise peaceful part of the world.

Amsterdam, June 12, 1942. Anne celebrates her 13th birthday and begins her diary, which she calls "Kitty". Hiding for two years from the German threat, the young girl writes about her idealistic views on the world, her ambitions, her fears and her first love, Peter.

Second movie sequel of Wake Up, Girls!.