Jojima Orin is orphaned when Tsunejiro murders her father. She is later adopted by the Kosuji family, who run a restaurant called Yagumo, and becomes a gambler just like her father. Orin meets Tsunejiro again and confronts the Iwabune mob to take back Yagumo that rightfully belongs to her brother.
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'Heat Wave' has real potential, a case where fine tuned editing would have been extremely beneficial. There's evidence of masterful direction by Gosha, no doubt (my favorite of which is the opening scene set on a mountain at sunset, the sun burning in the horizon, and our nude, tatted heroine dousing herself with buckets of water in slo-mo). Generally, a good film, though. A little cheesy, but pretty entertaining.