In a quiet and seemingly perfect neighborhood, a university history professor, who has lost his wife in a terrorist attack, begins to suspect that his new neighbors are not what they seem. After meeting the friendly Lang family, it becomes impossible to ignore the strange coincidences and behaviors of these seemingly charming individuals. The protagonist, obsessed with safety and vigilance after the tragedy that marked his life, realizes that his instincts might be right.
As he delves deeper into the Langs' life, his curiosity turns into paranoia. He finds signs of unconventional activities that lead him to question not only the nature of his neighbors but also the very safety of his home and surroundings. Under the pressure of his concerns, the professor increasingly feels isolated. His friends and the police dismiss his theories, considering him a man marked by trauma.
With an ending that approaches inevitable catastrophe, the film explores themes of trust, the fragility of social balance, and the thin line between reality and paranoia. The tension escalates until the very last moment, leading us to a shocking conclusion that will reveal not only the secrets of the Lang family but also the chilling truth about what may truly lurk in the shadows of the everyday.