Seasoned musician Jackson Maine discovers — and falls in love with — struggling artist Ally. She has just about given up on her dream to make it big as a singer — until Jack coaxes her into the spotlight. But even as Ally's career takes off, the personal side of their relationship is breaking down, as Jack fights an ongoing battle with his own internal demons.

Drunken, has-been rock star John Norman Howard falls in love with unknown singer Esther Hoffman after seeing her perform at a club. He lets her sing a few songs at one of his shows and she becomes the talk of the music industry. Esther's star begins to rise, while John's continues to fall. She tries desperately to get John to sober up and focus on his music, but it may be too late to save him.