Ryota Nonomiya is a successful businessman driven by money. When he learns that his biological son was switched with another child after birth, he must make a life-changing decision and choose his true son or the boy he raised as his own.
Members of a cult, modeled on Aum Shinrikyo, sabotage a city's water supply, then commit mass suicide near the shores of a lake. Family members of those affected by it meet at the lake to observe the anniversary of their loved ones' deaths.
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.