Once More, My Darling (1949) Spoiler-Free Summary – What It's About

Collier Laing, played by Robert Montgomery, enjoys the leisurely life of a confirmed bachelor, comfortably residing with his high-powered attorney mother. His days of idle ease are abruptly interrupted when the United States Army Reserve recalls him to active duty under the command of Colonel Head, played by Roland Winters. Thrust from civilian comfort into a uniform, Collier finds that his new assignment requires a very particular set of skills—skills that have little to do with combat and everything to do with charm.

The case involves a jewel heist with international implications, and the trail unexpectedly leads to the glamorous world of a young actress. Marita Connell, played by Ann Blyth, becomes the focal point of the investigation when a piece of the stolen loot is traced to her possession. The Army suspects that a thief enamored with the rising star may have gifted her the evidence without her knowledge, leaving Collier with an unorthodox directive: he must insinuate himself into Marita's orbit and romance her to uncover the culprit.

Posing as a survey taker to initiate the ruse, Collier enters a world of high society and unexpected entanglement. Marita, a spirited Bel-Air socialite, embraces the attention with a passion that threatens to upend the delicate operation. As the fake courtship deepens, Collier must navigate the chaos of a woman who refuses to play by the rules of his script, all while balancing the demands of his superior and the looming presence of the elusive thief. The stage is set for a collision between duty and desire, where a carefully constructed lie begins to spiral into something neither party anticipated.