The movie doesn't retell the story so much as stand inside each character's head while it happens, watching them fail to say what they're actually feeling. That gap between what they think and what they say is where all the pain lives. By the end, when they finally write it down, you understand why silence was the only thing they could manage before.

A year after their late friend Meiko Honma came back into their lives, Jinta Yadomi and the rest of the Super Peace Busters gather again over the summer. They decide to write letters in her memory, and while trying to enjoy their time together they look back on the days before and after her death. The film revisits the major events of the original TV story as flashbacks, each told from the viewpoint of a different member of the group, and adds new scenes from their childhood, from the period of the series, and from the year after it ended. Along the way, each friend works toward finding the strength to let go. The result is a supernatural drama with threads of romance and everyday life.