In a dreary French apartment complex, Monsieur Hire, a reclusive and peculiar tailor, becomes the subject of neighborhood suspicion when a young woman is found murdered nearby. His aloof demeanor and solitary habits make him an easy target, but his secret world revolves around a more personal obsession. Hire spends his evenings peering through his window into the apartment across the courtyard, where his beautiful neighbor, Alice, lives. He observes her with a mix of longing and fascination, creating an intimate yet one-sided connection with her life, unbeknownst to Alice herself. As police scrutiny on Hire intensifies due to the murder investigation, his voyeuristic ritual with Alice continues to draw him deeper into a complex web of emotion and intrigue.

Meanwhile, Alice is entwined in her own complicated relationship with her boyfriend, Emile, who remains oblivious to the attention of their quiet neighbor. The mounting tension around the unsolved crime stirs chaos in this small community where everyone is under heightened suspicion. As Monsieur Hire's secluded world begins to unravel, questions of trust, motive, and human connection come to the forefront. Underneath the layers of mystery and deception, secrets are poised to disrupt lives as both Hire and Alice grapple with unexpected revelations that could change everything. Through the tension of an unresolved murder and covert obsession, themes of isolation and yearning unfold amidst the ordinary backdrop of urban life.