Thirty years after rising to global stardom in The Wizard of Oz, showbiz legend Judy Garland arrives in London to perform a five-week sold-out run at The Talk of the Town. While preparing for the shows, Garland battles with management, reminisces with friends and adoring fans, and embarks on a whirlwind romance with soon-to-be fifth husband Mickey Deans, all while bravely struggling to overcome intensifying anxiety and physical decline.

British songwriter Gretta is adrift in Manhattan after getting dumped by her philandering rock star boyfriend. While playing at an open mic night at a local bar, she is discovered by struggling music producer Dan. Sensing her songwriting potential, Dan pushes Gretta to sign with him and record an ambitious outdoors album all across the city.

"Daisy is a girl coming of age in L.A. in the late sixties, sneaking into clubs on the Sunset Strip, sleeping with rock stars, and dreaming of singing at the Whisky a Go-Go. The sex and drugs are thrilling, but it's the rock and roll she loves most. By the time she's twenty, her voice is getting noticed, and she has the kind of heedless beauty that makes people do crazy things. Another band getting noticed is The Six, led by the brooding Billy Dunne....