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Shuhei Horikawa, a poor schoolteacher, struggles to raise his son Ryohei by himself, despite neither money nor prospects.
A Japanese mountain inn patron's foot is cut by an ornamental hairpin accidentally left behind by a former patron, leading to much curiosity among the other patrons regarding her identity.
When the future of his construction company falls into danger, a controlling father pushes his children into unsatisfying marriages and careers in order to regain financial stability.