Five years before the events of the film, Bob suffers the devastating loss of his wife and child. To cope with this tragedy, he downsizes to a smaller home, acquires some fish in a quest for companionship, and begins to experience a peculiar mental decline. This is illustrated through a news report that recollects his family's deaths, and through symbolic moments like the appearance of two hummingbirds outside his window, harkening back to his lost loved ones.
As Bob navigates his new life, he becomes enamored with Paula, who treats him poorly and shows little interest in him. In his attempt to escape reality, Bob creates an imaginary character, Vanessa, a vibrant Hula Girl who temporarily fills the void left by Paula. This fabrication is a testament to his deteriorating mental state — she often appears whenever he is reminded of the Hula Girl. The breakdown of his doll parallels Bob's own fragmentation, as he finds comfort in a non-existent relationship.
As turmoil intensifies, Bob's apartment is left in shambles, his fish tank is neglected, and his mental health spirals. He eventually brings a gun to work, envisioning a violent act to reclaim a sense of control. This leads him to fantasize about shooting several people before turning the gun on himself, though a part of him remains detached, represented by Coleman, who seemingly embodies his worst impulses.
But when the pivotal moment arrives, Bob's intended reality shatters as he instead shoots Coleman, becoming an accidental hero in a world that chooses to overlook the loaded gun he had at work. The imagery of a solitary hummingbird in his window upon his return home indicates his guilt over Vanessa’s imagined demise.
Bob's life inexplicably improves as people who once ignored him suddenly embrace him, culminating in a farcical promotion and a new car. However, as he grapples with the notion of life and death, he questions his choices, scribbling down whether he should "finish what Coleman started." Here, he starts to wrestle with the weight of his own existence.
Fantasy and reality clash when Bob is confronted by a grief counselor who ultimately urges him to accept that he is the root of his problems. The counselor embodies the voice of reason and truth that Bob has been evading. As the film progresses, Bob's life takes a downward turn; he loses his imagined accolades and the support of those around him.
In a final confrontation, he emerges from his fantasy world, realizing the stark contrast between his dreams and his painful reality. The flickering presence of Vanessa morphs into Paula, exposing the truth behind his illusions. When the sixth bullet, meant for himself, flickers in and out of existence, Bob grasps the reality of his mental affliction.
Ultimately, Bob's tragic realization culminates in a poignant conclusion where he acknowledges the veracity of the grief counselor's words—he is the problem. As he succumbs to his inner demons, Vanessa's imaginary form dissipates like a whisper, leaving behind the painful echo of loss as the police arrive to grapple with the remnants of his shattered existence. This haunting tale explores deep themes of grief, identity, and the sometimes blurry line between imagination and reality.
