The First World War is drawing to a close, but the great battle of a young French woman has just begun.
What Mathildelooking forward to is not the return of his fiancé Mannich, but a letter from the front line that brings the news of his death. In the brutal Battle of the Somme, Mannich, who was accidentally injured, and four other self-inflicted bodies, and the soldiers who refused to go into the battle were tried together. The inhumane military court ruled that they were placed on the Somme between the two armies. No man's land, in the crossfire of Germany and France, here undoubtedly represents death.
Unable to accept this fact, Mathilde firmly believes that his fiancé is not dead, and he will definitely come back to fulfill the agreement they had made since childhood. In order to prove this almost impossible fact, she resolutely embarked on the long journey of finding a husband with a disabled left leg, accompanied by her only firm belief, amazing strength, stubborn optimism and hope that she will never be broken. Because she knew that if the fiancé dies, she must be the first to feel it.
Exploring Mannich's trajectory before his last disappearance, and feeling his horror during those turbulent years, Mathilde, with the help of many people who had contact with his fiancé, gradually embarked on the Somme River of no return. She has received ominous news from the people around Mannich many times, but these blows have never been able to sap her determination to continue searching.
As the investigation approached the truth of the facts step by step, Mathilde gradually understood the cruel punishment suffered by these five unfortunate soldiers, and these increasingly close truths also made her gradually realize the fear of war and its effects. The harm that people leave behind that can never be healed. And those sweet childhood memories that have accompanied her through the difficult years do not know whether she will be the echo of the disappearing feelings, whether she will never be able to find her fiance to complete this A Very Long Engagement, love will cause a tragedy, or it will give birth to a miracle
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