In a seemingly ordinary life, taxi driver Tarek Fahd stumbles upon a newspaper advertisement that piques his interest—a call for participants in a disturbing experiment, promising a reward of 4000 German marks. This experiment, masterminded by the authoritative Professor Klaus Thon and his assistant, Dr. Jutta Grimm, simulates a prison environment where ordinary individuals will find their civil rights stripped away.
Tarek is drawn into the situation not just as a participant, but also as a journalist, equipped with glasses that contain a hidden mini-camera, set to document the unfolding events. However, just before the experiment begins, he finds himself in an unexpected and fleeting romance with a woman named Dora. Their time together, filled with intimacy and connection, lingers in Tarek's mind through poignant flashbacks that recur throughout the narrative.
As the experiment begins, a group of 20 volunteers is divided into guards and prisoners—a dynamic that takes a rapid shift when civil liberties vanish and a ruthless hierarchy is established. The guards wield power and authority, while the prisoners, stripped of their names and dignity, are merely reduced to numbers; Tarek being designated as prisoner number 77. His initial act of rebellion—refusing to respect the guards' authority by sharing a drink with a lactose-intolerant cellmate—demonstrates his resistance to submission.
Tarek forms bonds with fellow inmates, namely Steinhoff and Schütte, as circumstances grow increasingly dire. The atmosphere becomes tense and malignant, with psychological strains accelerating the already deteriorating situation. Soon, a clear delineation of power develops—Tarek emerges as a leader among the prisoners, while the sadistic guard, Berus, defines the vicious security side with a chilling motto: "Humiliation is the only way we can solve these troubles."
As days pass, guards begin to cross ethical boundaries, escalating to increasing violence and humiliation against the prisoners. Tarek faces severe abuse as he becomes the target for the guards' unchecked ferocity. He is subjected to a horrifying array of dehumanizing experiences: kidnapped, stripped of his dignity, and forced into acts that rob him of his self-worth. The horrors culminate in a devastating incident where fellow prisoner Schütte meets a tragic fate, succumbing to severe violence and neglect.
The experiments come under scrutiny as tensions rise. Dr. Grimm advocates for halting the harrowing process, but Professor Thon is adamant about observing the peak of brutality. Meanwhile, Dora, keen on knowing the truth about Tarek’s situation, learns of his contract to participate and makes brave attempts to reach him within the confines of the facility.
In a relentless battle for integrity and survival, Tarek, with the help of a few allies, triggers an uprising against the guards. He makes a daring escape from solitary confinement, leading to a complete breakdown of order as chaos erupts within the facility. Amid the mounting violence, a pivotal moment arises when Tarek intervenes to save Dr. Grimm from a brutal assault, further igniting their struggle for freedom.
In the climactic finish, with Professor Thon finally arriving on the scene amidst all the turmoil, the unfolding events conclude in harrowing revelations. The escapees face lingering threats from guards like Berus and must make daunting choices that test their humanity. The escape plan materializes as they navigate perilous paths, challenging authority while fighting for the hope of a better future.
The heart-wrenching story wraps up with a news report confirming the tragic deaths of Schütte and Eckert, alongside injuries to Thon and others. The fate of both Berus and Thon now rests in the hands of the law, ensuring that the shadows of their actions do not go unpunished. The brutal realities of power dynamics linger long after the credits, making a lasting impact on audiences and forcing them to reflect on the limits of human endurance and morality.
