Manny, Joel and Jonah tear their way through childhood and push against the volatile love of their parents. As Manny and Joel grow into versions of their father and Ma dreams of escape, Jonah, the youngest, embraces an imagined world all his own.

One day, five kindergarten children suddenly disappear from a kindergarten in Tokyo, sending their teachers and parents into a panic. The five of them are connecting on trains and headed to an unfamiliar place for some purpose. Before their journey, they had made a promise to each other “not to cry no matter what happens”

Twelve-year-old Koichi, who has been separated from his brother Ryunosuke due to his parents' divorce, hears a rumor that the new bullet trains will precipitate a wish-granting miracle when they pass each other at top speed.