The Waldorf Astoria is the classiest hotel along the Manhattan skyline in 1930s New York City. When a charming woman named Nina checks in with a high-society entourage, young Frank, a bellhop, and Theresa, a maid, get caught up in a series of mysterious thefts. The stakes quickly grow perilous, and the pair must rely on each other to discover the truth while navigating delicate class politics.