1985. A Korean American boy, Yong, desperate to fit in at school makes a wish to become his idol, the world’s most famous foul-mouthed comedian! But when his wish comes true, it brings unexpected profane results.

The grubby denizens of "Sing!" Karaoke bar become gorgeous creatures when they stand on the tiny stage, but their music is threatened by the corporate chain, "Mark and Bingo's" moving in across the street.