An egotistical radio shock jock, Jack Lucas, finds his life in disarray when his on-air advice has unintentional, tragic consequences. Spiraling into a pit of despair, Jack's existence becomes a mix of self-loathing and alcohol. His path crosses with Parry, a seemingly homeless man with a whimsical worldview and a fixation on the legend of the Holy Grail, which he believes to be hidden in the heart of New York City. Parry is plagued by a traumatic past and enveloped in a fantasy world where he sees himself as a knight on a quest for the Grail. His erratic behavior both confounds and intrigues Jack.

As their lives intertwine, Jack learns that Parry harbors a devastating secret connected to Jack's own past misdeed. Embarking on a redemptive journey, Jack decides to help Parry in his quest for the Grail. Along the way, Jack meets and becomes enamored with Anne, a kind-hearted woman who runs a video store. As Jack gets closer to both Parry and Anne, he discovers that his road to salvation is not just about helping himself, but also about bringing hope and love back into Parry's life, who has lost so much. Their tangled lives form a complex web of guilt, redemption, love, and the pursuit of dreams in a hard-edged world.