Graham Krakowski is a meticulous but anxiety-ridden business analyst who recently acquired his dream home, a modest fixer-upper in a seemingly quiet neighborhood. As he settles into his new life, he discovers an unsettling presence—a disheveled and menacing vagrant who loiters just outside the boundaries of his property. Graham's initial attempts to involve the police and rid himself of the man yield no results, as they dismiss the vagrant as harmless. However, the bizarre series of events that begins to unfold leads Graham to believe the vagrant is not just a simple nuisance but a genuine threat to his safety and sanity. His paranoia quickly sets in as mysterious occurrences, including vandalism and theft within his house, escalate.

Consumed by fear and distrust, Graham's life spirals as he becomes obsessed with capturing proof of the vagrant's misdeeds. His erratic behavior starts to affect his work life, romantic relationships, and grip on reality. As pressure mounts from all sides, Graham finds himself at a breaking point, unsure if his adversary is real or a figment of his unraveling mind. The lines between victim and perpetrator blur, leaving him embattled in a psychological struggle and desperate for answers. As the tension builds, the stakes become increasingly perilous, leading to unforeseen consequences that test Graham's resilience and desperation for peace in his chaotic world.