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The Georges Simenon novel Le Fils Cardinaud was the basis of La Sang a la Tete. Jean Gabin plays a middle-aged businessman, saddled with a restless young wife. When he loses his spouse to a handsome young juvenile delinquent, Gabin cannot control his envy and hatred. These negative emotions spread like diseases throughout Gabin's hometown, leading to a tragedy of unexpected dimensions. Resisting all temptations to tear a passion to tatters, star Gabin expertly underplays his role. La Sang a la Tete was released in English-speaking countries as The Blood to the Head.