A mentally unstable man, tormented by nightmares of a gruesome murder he may have committed, escapes from an institution for the criminally insane. Plagued by flashbacks of his childhood trauma, he can’t distinguish his dreams from reality. He enters New York City, trying to piece together his past, but his mental state gradually deteriorates. Beneath his fractured psyche lies a violent secret that haunts his every waking moment.

As the man's episodes intensify, he seeks solace in the companionship of a woman who accepts him despite his troubled mind. However, his inner turmoil manifests in increasingly disturbing and violent visions, suggesting a sinister connection to an actual series of murders unfolding in the city. An air of paranoia envelops him and those around him as the boundary between his nightmarish hallucinations and the real world grows dangerously thin.