On the set of Boom!, a big‑budget adaptation of a Tennessee Williams play, Elizabeth Taylor is at the height of her fame. It's an exhilarating experience for everyone in her orbit. That includes Jean, her personal assistant, and Buddy, her semi-closeted best friend and costume designer.

Yet Jean can see that for all Elizabeth’s verve, she's worried that her box-office potential is dimming. At thirty-five, she needs to stretch. She sets her sights on an unlikely role: the lead in the film version of Hello, Dolly!

Jean and Buddy must also help Elizabeth navigate her tempestuous personal life. The Burtons live on their lavish yacht during filming, and Elizabeth is fiercely protective of her four children. Richard Burton's heavy drinking makes him apt to stray, and soon the off-screen dramatics eclipse anything happening in front of the cameras.

But beyond the public spectacle, there are other, undeniable transformations underway. By the time Boom! wraps, Jean and Buddy’s lives will have changed irrevocably. And the star herself will have taken steps toward a new legacy built not on her fabled beauty but as an entrepreneur and humanitarian, driven to help others live their best lives . . .