In mid-18th century Paris, the notorious Sanson family serves as the executioners of France. After being expelled from boarding school due to relentless bullying, 14-year-old Charles-Henri Sanson, the fourth-generation heir of the family, finds himself caught in a legacy he never chose, expected to take over a trade that society both loathes and fears. Despite his soft-hearted and idealistic nature, Charles-Henri is compelled to start his grim training under the family’s high expectations, confronting the moral and emotional trials that will shape him. As he assumes the role of Paris's executioner, Charles-Henri must navigate twisted love, family dynamics, and the harsh realities of a society governed by cruel, decadent nobles.