In the center of the plot of the comedy "Fool Nadia" is a sweet, trusting and sympathetic girl named Nadezhda. She is always ready to help absolutely every person, the heroine will help her neighbor even to the detriment of herself. Sometimes such responsiveness goes sideways to the heroine, but despite the cruelty, cynicism and selfishness of some personalities, Nadia does not stop believing in human kindness and sincerity. One day, the kindness of the heroine attracts the most worthy man ...