Set in Paris during the years of the Reign of Terror, 'The Gods Want Blood' centres on the rise to power of Jacobin sympathizer Evariste Gamelin, a young painter who becomes a juror on a local Revolutionary tribunal. Caught up in the bloodthirsty madness surrounding him, he helps to dispense cruel justice in the name of his ideals, while at the same time succumbing to his own petty instincts of revenge when he jealously pursues a rival for the affections of his lover Elodie.