After transferring to the same elementary school, Takaki and Akari became best friends.However, their lives change when the families of both are forced to relocate. After a year of separation, Takaki is about to reunite with Akari. As he sits on the train from Tokyo, memories of the past rush through Takaki's head, his meeting time with Akari drawing ever closer. Takaki and Akari begin to wonder if they will ever be able to see each other again, and share their secret feelings.