Jock Mahoney plays the lead in one of those b&w B movies which the cop and lawyer shows on TV were rapidly replacing. Jock travels from New York to L.A. to investigate the disappearance of a fellow insurance investigator and, as a result, quickly becomes acquainted with the three blondes of the title. The "mystery" which confronts him fails to adequately intrigue the viewer and the blondes with whom he interacts lack the hoped-for fascination. The final product of all Jock's efforts is a bare-bones time-killer which evokes its era -- beginning with the title song accompanying the opening credits -- without giving one the slightest urge to re-visit it.
Those looking for a point of interest in this material might consider how it presents Jock Mahoney. Despite his "hunk" status, usually emphasized by frequent "beefcake" scenes, he's shown here in virtually every scene wearing a suit and tie, and he seems to have no sexual interaction with any of the blondes. (They're interested; he's not.) This state of affairs makes the movie seem more like a product of the early 1950s rather than the early 1960s. Jock does have two bare-chest scenes, but they're curiously staged. In the first, he's shown lying belly-down in bed, shirtless, and the only glimpse you get of his chest is an oblique one as he reaches out to answer a telephone. In the second, Jock unbuttons and removes his shirt but you don't see him directly but rather watch his image as reflected in a mirror. It's almost as if Jock's physique is so striking a sight that it must be shown to the viewer only in rationed and carefully-controlled circumstances.