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Saya (Yui Aragaki) is a young widow mother. Her husband Yutaro (Yo Oizumi) died in an accident. Yutaro abandoned his wealthy family to marry Saya. To protect her baby, she goes to the town of Sasara where her aunt lived. Her aunt passed her house down to Saya. Saya and her baby settles down there, but she has difficulties dealing with her situation. At this time, her dead husband Yutaro borrows other people's bodies to help Saya, but Yutaro's family tries to take her baby away.

Two brothers are separated after their parent's divorce. Older brother Koichi (Koki Maeda) lives with his mother (Nene Otsuka) and grandparents in Kagoshima. Younger brother Ryonosuke (Oshiro Maeda) lives with his father (Joe Odagiri) in Fukuoka. Meanwhile, the Kyushu trainline connecting these two cities is nearing completion. A rumor spreads that when the bullet trains first runs (one coming from the north and one coming from south) and at the exact moment the two trains crosses paths energy is released and wishes will be granted to those that witness the event. Koichi hears of the rumor and implements a plan with his younger brother to reunite his family ....

A group of friend determined to express themselves decide to build thier own gunpowder rocket to compete at an annual festival held in their village.