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Heisses Blut (Hot Blood) is a vehicle for musical-comedy favorite Marika Roekk, who always did better with the public than she did with critics. Set in Hungary, the story centers on a once-wealthy family, now on their uppers. Heroine Marika von Koeroessy (Roekk) is willing to give up almost everything she has to keep her loved ones out of debtor's prison. But Marika draws the line at selling her beloved horse Satan, and it is this refusal that motivates the rest of the plot. Most of the songs in Heisses Blut are traditional Gypsy tunes, of a sort that would soon be banned by the racist Hitler regime.