In this charming Mexican comedy, Cantinflas stars as Inocencio Prieto y Calvo, a man who inherits two million pesos after receiving a letter from an attorney. However, being illiterate, he has no idea what the letter says and must rely on others to read it for him. Determined to gain control over his newfound wealth, Inocencio decides to learn how to read and writes himself, leading to a series of hilarious misadventures as he navigates love, friendship, and his own financial future.