In a quiet and affluent house in an American suburb, the life of the Kirby family takes an unexpected turn when they welcome a famous theater critic, Sheridan Whiteside, as their guest. Everything starts with an accident that forces him to stay in their home for several weeks. What was supposed to be a simple visit turns into an explosive mix of humor and drama, as Sheridan, with his extravagant personality and vast influence, transforms the house into his own kingdom.
As the family tries to adapt to their unusual guest, tensions begin to rise. Sheridan not only oversteps his bounds as a guest, but he also starts to interfere in the Kirby family's romantic relationships, creating chaos and romantic confusion. Furthermore, his whimsical behavior and constant complaints attract a varied cast of characters, from admirers to enemies, adding a touch of madness to the household.
As the days go by, the family finds themselves caught between their desire to regain normalcy and Sheridan's uncontrollable nature, who, despite his selfishness and eccentricities, begins to awaken in them a renewed sense of life. With a charming balance of comedy and social critique, the story explores the challenges of cohabitation and the impact that one individual can have on family dynamics, demonstrating that sometimes, the unexpected can lead to the best memories.