A few seconds after the vehicles stopped outside, the women inside the building heard boots ascending the stairs, pausing on each floor, knocking on doors. When they reached the third floor, the knock was so forceful that the wood trembled in its frame.
Marguerite opened the door, because she understood that resistance would be useless. Two SS soldiers entered without asking permission. One of them, a young blond man with pale eyes, carried a briefcase containing a list of names. He looked at Marguerite and said in broken but firm French: “Marguerite Leclerc.” She nodded. He continued: “You are coming with us now. Take only what you are wearing.”
Marguerite tried to ask why, but the soldier cut her off with a phrase she would never forget for the rest of her life.
“If you scream, it will be worse.”
Marguerite was escorted down the stairs alongside Louise and seven other women from the same building. Outside in the street, dozens of women had already been gathered together — all between twenty and forty years of age, most of them nurses, caregivers, and women who worked in the city’s hospitals, clinics, and dispensaries.
They were loaded into the back of military trucks covered with tarpaulins, guarded by armed soldiers who refused to answer any questions. The cold was biting. Some women wept softly. Others sat in a state of absolute shock. Many simply stared into the darkness, trying to comprehend what was happening to them.
Marguerite pressed her hands together for warmth and looked around her. She recognized several colleagues — women she passed every day in the hospital corridors. “Why only us?” Louise whispered beside her. Marguerite had no answer. But one thing was unmistakably clear: this was no ordinary arrest. There was no accusation, no stated charge, no interrogation. It was a systematic collection, planned and executed as if the women were cargo.
The trucks moved through an empty city, passing through deserted streets and German military checkpoints that waved them through without question. Marguerite tried to memorize the route, but the fog and darkness made everything disorienting. After approximately twenty minutes, the vehicles stopped.
The women were removed from the trucks and led inside a building that Marguerite did not immediately recognize. It was an old stone structure with windows covered by wooden planks and a side entrance that descended directly into a basement. It was only when she noticed the partially erased medical symbol on the side wall that she understood where they were.
It was the former Saint-Jean hospital — a building that had been officially closed since the beginning of the German occupation, shuttered due to claimed lack of resources. But now, under German control, it was clearly operational. Dim lights glowed from the basement windows, and the smell of chemical disinfectant mixed with mold saturated the air.
The women were divided into groups of ten and taken to separate rooms. Marguerite was placed in a cold space with concrete walls, lit by a single bulb suspended from the ceiling. There were rows of metal stretchers, improvised examination tables, and medical instruments she recognized from her training — but arranged in configurations that bore no resemblance to any ordinary clinical procedure.
A man in a white coat entered the room. He was tall, German, wearing metal-framed glasses, with a completely neutral expression. He did not introduce himself. He simply said in French: “You have been selected to participate in a medical study essential to the Reich’s war effort. Cooperate, and nothing bad will happen. Resist, and the consequences will be severe.”
Marguerite felt the blood drain from her face. Beside her, Louise began to tremble uncontrollably.
The doctor continued. “Complete physical examinations will be conducted. Samples will be taken. In some cases, minor procedures will be performed. Everything will be documented. You are not permitted to speak of what occurs here. If you do, your families will bear the consequences.”
One by one the women were called into an adjacent room. Each time the door closed, the remaining women waited in absolute silence, hearing only the muffled sound of German voices and the rustling of papers. When the first woman returned half an hour later, she was pale and trembling, dried tears on her face, a bandage on her left arm. She said nothing. She simply sat down in a corner, pulled her knees to her chest, and stared at the floor.
It was in that moment that Marguerite understood the full weight of what was happening. This was not a political arrest. This was something of an entirely different nature — and she was trapped here with eighty-eight other French women in a clandestine facility operating beneath a city that would later pretend none of this had ever occurred.
In the three days that followed, Marguerite and the other women were held in the basement under constant surveillance. There were no windows, no clocks. Time became an abstraction measured only by irregular, sparse meals — stale bread, thin potato soup, and lukewarm water in dented metal cups. The women slept on thin mattresses on the damp floor of a large room, under lights that were never switched off. The cold was relentless. Many developed fevers. None of them received treatment — a cruel irony not lost on women who had dedicated their professional lives to caring for the sick.
Marguerite spent those first days in careful observation, attempting to understand the logic behind the operation. She noticed that the German doctors moving through the basement were all civilians, not military personnel — though they were clearly operating under SS authority. They wore immaculately pressed white coats, carried briefcases filled with notes written in German, and spoke to one another in low, technical voices entirely devoid of emotion.
On the fourth day of captivity, Marguerite was called for a formal examination. She was led to a small, well-lit room where a middle-aged doctor with greying hair and a thin scar on his forehead sat waiting behind a metal table. He gestured for her to sit. A medical file rested before him, her name written across it in Gothic script.
The doctor spoke fluent French. “Marguerite Leclerc. Twenty-nine years old. Nursing assistant at the Édouard Hiot hospital since 1939. You have training in administering intravenous injections and post-operative care.” He proceeded to recite precise details of her personal medical history — details she had never shared with German authorities. She felt a cold shiver move through her. He did not wait for a reaction. He called in a German nurse and gave instructions for a full series of examinations.
What followed lasted nearly two hours. It was thorough, invasive, and conducted without any emotional acknowledgment of the person being examined. When it was over, Marguerite was taken not back to the common room, but to a smaller, isolated space — a mattress on the floor, a bucket, a dim bulb that never went dark. She asked the escorting soldier why she was being separated from the others. He did not answer. He locked the door and left.
The isolation lasted two days. It was, she later understood, deliberate — part of a methodical process designed to break psychological resistance before any physical procedure began.
On the sixth day, she was brought to what the Germans called the procedure room. Four metal stretchers were arranged side by side, each fitted with leather restraints for the wrists and ankles. Three doctors in surgical masks and gloves were present. One of them pointed to a stretcher. “Lie down.”
Marguerite obeyed. The restraints were tightened until she could not move. The doctor approached with a large syringe containing a clear liquid. “This is an experimental compound,” he said in the same neutral tone. “We are testing its effectiveness in suppressing inflammatory responses in human tissue following surgical trauma.”
The injection was administered before she could speak. The reaction was nearly immediate — a wave of heat that moved up her arm and spread through her chest and into every part of her body. Her heart accelerated violently. She began to perspire despite the cold. Her vision blurred. She lost consciousness.
When she came back to awareness, she was lying on a mattress in the common room. Louise was holding her hand. “You were unconscious for almost six hours,” Louise whispered, her face streaked with tears. “We thought you weren’t going to wake up.”
In the weeks that followed, Marguerite learned that she was far from alone in what she had endured. Of the eighty-nine women captured that night, at least sixty were subjected to various forms of medical testing — injections of unidentified substances, exposure to chemical agents, exploratory surgical procedures conducted without adequate anesthesia, and in some cases, procedures that caused permanent harm. At least seven women died during this period. Their bodies were removed in the night, without ceremony, without any official record. It was as though they had never existed.
Despite the pain and the fear, Marguerite began doing something no one else in that basement had the steadiness of mind to attempt. She began to memorize everything. The names she overheard. The times of the procedures. The instruments used, the bottles of medication, fragments of conversations between soldiers. She knew that if she survived, this information would matter.
Louise noticed and whispered to her one evening: “Why are you doing this? They’re going to keep us here forever.”
Marguerite looked at her with quiet, iron determination. “If I die here, let it be knowing that I tried to preserve the truth. But if I leave alive — someone must know what they did to us.”
By late December 1943, after nearly six weeks of captivity, something outside those walls began to shift. The French Resistance, which had been monitoring unusual SS movements near the old Saint-Jean building, had received reports from families of missing women. A former professor of medicine named Henri Gaston had taken it upon himself to investigate.
Working with an intelligence contact named Simon Fournier — who maintained connections with British Special Operations agents — Henri had begun documenting the patterns of movement in and out of the facility. Sealed wooden crates removed in the early hours of the morning. Armed escorts. A building officially closed that showed every sign of active, hidden use.
What Henri needed was a source from the inside. And the opportunity arrived from the most unexpected direction — a German civilian nurse named Greta Müller, who had been assigned to the facility without understanding what she was walking into, and who had begun to find it impossible to remain silent about what she was witnessing.
One evening, as Greta passed Marguerite while delivering food, their eyes met for just a moment. It was enough. Marguerite took the greatest risk of her captivity. She waited for Greta to pass a second time and whispered in halting German — a language she had learned only partially during her training. “Please help us. You are not like them.”
Greta froze. She looked around. Then she left the room without a word.
Marguerite was certain she had made a fatal mistake. But three days later, Greta returned — and as she passed, she let a small folded piece of paper fall to the ground near Marguerite’s feet. That night, alone, Marguerite opened it.
Written in shaky French: “I want to help. But I don’t know how. What do you need?”
For the first time in six weeks, Marguerite felt something other than dread. She felt the first fragile thread of possibility — and with trembling hands, she reached for a small piece of charcoal she had kept hidden, and began to write back.