American fashion designer Halston skyrockets to fame before his life starts to spin out of control.
Looking to reinvent himself, Halston sets out to create a signature look, assembling a design team and finding inspiration in new friend Liza Minnelli.
Halston considers a fateful business deal and meets a charismatic escort while struggling with old insecurities ahead of a historic fashion show.
Creating a new perfume turns into a fraught and emotional venture for Halston, whose love life grows increasingly entangled with his expanding empire.
Halston's nights of excess at Studio 54 and days fueled by cocaine take a toll as he suffers ruptured friendships, stiff competition and a sudden loss.
With his career in a nosedive and his personal life a mess, Halston receives an artistic lifeline from an old friend before embarking on a last journey.