After transferring to the same elementary school, Takaki and Akari become best friends. But when both families are forced to relocate, their lives change. After a year of separation, Takaki is about to reunite with Akari. Sitting on the train from Tokyo, memories of the past rush through his mind as he draws closer to his life-long friend. Join Takaki on a journey into three interconnected tales of love and lost innocence that span the minutes and months of their lives.