Louise Wong, in her screen role debut, stars as the titular singer, depicting her life from childhood until her last moments before her death of cervical cancer in 2003.

An extended director's cut, featuring 1 hour of extra footage, was released digitally as five-episode miniseries on Disney+ through Star starting from 2 February 2022.

Grateful for her earlier generosity, Kong had her lined up to star in Zhang Yimou's House of Flying Daggers (2004), but Mui died in December 2003 before the film began production.

[11] Leung wrote an initial synopsis, conducted a year of interviews with Mui's inner circle, and developed a script with co-writer Jack Ng.

[14] In addition to Wong, the production team cast Louis Koo to play fashion designer Eddie Lau, and Gordon Lam as pianist-friend So Hau-leung (蘇孝良).

[10] Leung, who had previously directed effects-heavy action films, used his post-production experience to leverage computer-generated Imagery to produce settings of the past.

[19] Filming in Thailand took place ostensibly in a secluded villa called Lanna Hill House, in the Mae-On district of Chiang Mai.

[20] Although Leung had members of his crew dedicated to obtaining the rights to Mui's music from the company that held them, he still found difficulty finding existing masters of her recordings and was only able to locate four originals.

Sony Pictures Releasing and Buena Vista International will distribute the film in five Asian countries, Malaysia, Singapore, Taiwan, Thailand and Vietnam by the end of 2021.

Richard Kulpers of Variety wrote, "Longman Leung’s nostalgic drama has a soft center but should still please the late star’s worldwide legion of fans.

While the film elaborates on Mui’s ultimately futile romantic relationships and highlights her charitable endeavors, it shies away from mentioning her fabled political activism in the aftermath of the Tiananmen Square crackdown in 1989.