Larry Flynt is the hedonistically obnoxious, but indomitable, publisher of Hustler magazine. The film recounts his struggle to make an honest living publishing his girlie magazine and how it changes into a battle to protect the freedom of speech for all people.

On one random day in the San Fernando Valley, a dying father, a young wife, a male caretaker, a famous lost son, a police officer in love, a boy genius, an ex-boy genius, a game show host and an estranged daughter will each become part of a dazzling multiplicity of plots, but one story.

When car dealer Charlie Babbitt learns that his estranged father has died, he returns home to Cincinnati, where he discovers that he has a savant older brother named Raymond and that his father's $3 million fortune is being left to the mental institution in which Raymond lives. Motivated by his father's money, Charlie checks Raymond out of the facility in order to return with him to Los Angeles. The brothers' cross-country trip ends up changing both their lives.