In the heart of the 1940s, a successful engineer finds himself trapped in the routine of his married life. Despite having everything a man is supposed to want—a house, a good job, and a lovely wife—he feels that something is missing. When he is presented with the opportunity to explore the possibility of a "temporary replacement" in his home, he cannot resist the idea of bringing a young and beautiful woman into his life: a sophisticated artist with a carefree outlook on the world.
As the new "wife" moves under the same roof, their personalities clash, and the protagonist's life transforms into a hilarious tangle filled with absurd situations and romantic entanglements. While his legitimate wife is away, the engineer enjoys life with his unexpected visitor, but soon discovers that fun comes at a price. Things become tremendously complicated when the real wife unexpectedly returns, and the engineer must untangle a web of lies and misunderstandings.
Caught in a whirlwind of misunderstandings and emotions, he is forced to confront what he truly values in his life. With a touch of comedy and a healthy dose of romance, this story explores the boundaries of love and responsibility, turning a simple experiment into a revealing journey that will change the course of their lives forever.