After finding out that her husband, Rudi, has a fatal illness, Trudi Angermeier arranges a trip to Berlin so they can see their children. Of course, the kids don’t know the real reason they’re visiting — and the catch is, neither does Rudi…

In 1940, Masaaki Takaoka works as a teacher in the agricultural division at a youth training institute. Although Japan’s defeat seems immanent, all of Masaaki’s students are drafted in a futile last-ditch effort. In an attempt to give the young men some hope, he makes everyone promise that they will all meet again under the cherry blossoms upon their safe return. Consumed by sadness over the fate of his students, Masaaki devotes the next 30 years of his life to develop a new species of cherry blossoms that could thrive in any climate in remembrance of his students.

A message has arrived from Kid the Phantom Thief, that he will steal a Japanese sword belonging to wealthy Onoe Family in Hakodate, Hokkaido. Conan and Heiji Hattori, who happened to be in Hakodate, are on the case to capture Kid. Coincidentally the family lawyer of Onoe is found murdered in the warehouse district, apparently slaughtered by a Japanese sword. The suspect is an investor/arms dealer who is said to be after Onoe family’s hidden treasure. In the North among cherry blossoms, the exciting hunt for treasure begins!

Spring time in April and the last of the cherry blossoms are still in bloom. The usually aloof bookworm with no interest in others comes across a book in a hospital waiting room. Handwritten on the cover are the words: “Living with Dying.” He soon discovers that it is a diary kept by his very popular and genuinely cheerful classmate, Sakura Yamauchi, who reveals to him that she is secretly suffering from a pancreatic illness and only has a limited time left. It is at this moment that she gains just one more person to share her secret. Trying to maintain a normal life as much as possible, Sakura is determined to live her life to the fullest until the very last day. As her free spirit and unpredictable actions throw him for a loop, his heart begins to gradually change.

Twenty-six-year-old Hiroto Suwa; his wife, Naho; and their old high school classmates—Takako Chino, Azusa Murasaka, and Saku Hagita—visit Mt. Koubou to view the cherry blossoms together. While watching the setting sun, they reminisce about Kakeru Naruse, their friend who died 10 years ago. Mourning for him, they decide to visit Kakeru’s old home, where they learn the secret of his death from his grandmother.