「讓我成為無政府主義者的，不是恨，是愛。」1899年的巴黎，孤兒出身的下士辛康，被選中滲入無政府主義的組織。辛康把握好當臥底的工作是上位的機會，為上司獵取到不少重要情報。然而，日復日，辛康逐漸被組織成員的信念打動，更愛上組織頭目的女友。隨著預謀攻擊行動的日子越來越近，辛康必須於任務和信念之間作出終極選擇。《先知》影帝與《接近無限溫暖的藍》影后攜手合作，刷出演技火花。

Jean Albertini, an orphan with humble origins, has become a corporal in Paris. In 1899, he is assigned to infiltrate a group of anarchists for the government. It is the best chance for him to climb up to a higher rank in the army, therefore Jean accepts the mission with great pride and confidence. As time goes by, he begins to question whether he is doing the right thing. Fascinated by the missions and the people in the gang, Jean is extremely torn between his duty and where his heart truly lies. He develops genuine feeling for Judith, the girlfriend of the leader, but time awaits no one, soon, he will need to make a decision before the planned attack.