In the vibrant and glamorous New York of the 1960s, we meet Chuck Baxter, a timid yet ambitious employee at a large insurance company. Although he strives to climb the corporate ladder, he feels trapped in his monotonous routine until he discovers an unexpected opportunity: to lend his chic apartment to his bosses so they can take their mistresses on clandestine getaways. Drawn by the idea of gaining a favor and improving his position in the company, Chuck agrees, which sets off a series of comedic entanglements and misunderstandings.
As he navigates the complications of being the "apartment guy," Chuck finds himself increasingly ensnared in a world of lies and promises. However, things become even more complicated when he falls for the charming yet troubled Fran Kubelik, the receptionist at his office, who is caught in a toxic relationship with Chuck's egocentric boss. Torn between the desire to be a successful man and the longing for genuine connection, Chuck rides an emotional rollercoaster as he tries to find his place in the world of love and business.
With a blend of romance, comedy, and a touch of bittersweet realism, this story explores the sacrifices and disillusionments of urban life as a man seeks his true happiness amid the unfulfilled promises of modern living.