In a devout, isolated Mormon community, fifteen-year-old Rachel believes she has experienced an immaculate conception after hearing a forbidden rock song on a cassette tape. Convinced the music holds a divine message, she embarks on a daring escape to the neon-lit chaos of Las Vegas to find the voice on the tape and the father of her child. Portrayed with captivating innocence by Julia Garner, Rachel is joined by her skeptical brother, Mr. Will, played by Liam Aiken, who follows to protect her. Their journey into a world of punk clubs and desert highways leads them to a group of rebellious teenagers, including the enigmatic Clyde, brought to life by Rory Culkin. Directed and written by Rebecca Thomas, this lyrical drama blends elements of a modern-day fable with a coming-of-age quest, exploring faith, family, and the search for one's own truth against a backdrop of starkly contrasting worlds.