New York lawyer and playboy Clay "Dal" Dalzell is asked by old friend Tim Winthrop to locate his girlfriend Alice, who mysteriously disappeared in Chicago a year ago.

Along with Donna Mantin, who has romantic designs on him, Dal attends a hit stage show titled "Midnight" that stars a masked actress, Mary Smith, who vanishes in mid-performance when Winthrop recognizes her and blurts out the name Alice.

[2] Noting the similarities to the previous year's The Thin Man (also starring Powell as a debonaire detective), however, Sennwald concluded "it is never quite as satisfying as its illustrious predecessor.

"[2] Writing for The Spectator, Graham Greene also drew comparisons between the film's craftsmanship and that of The Thin Man (as well as The Trunk Mystery), describing Star of Midnight as "a light, quick, sophisticated comedy ... all suavity and amusement, pistol-shots and cocktails".

[1] Star of Midnight has been released on VHS as part of the RKO Collection[4] and on DVD in Italy (region 2) as La Maschera Di Mezzanotte, with Italian and English soundtracks.