Dondog, a young man who grew up on a horse mane, becomes a cowherd after being reprimanded by the management for killing his horse in a race with a car. On this occasion, the relationship between Yanjmaa, a driver who came to the collective, Gonchig, who comes to trade for personal gain, and Dondog, a horseman, was shown in light comedy.

"I wish I could have a horse" shows how the lives of the main characters have changed after 30 years in a humorous tone. The plot of the plot shows how a cunning merchant man Gonchig gets rich as a young woman and becomes a company director, while the horseman Dondog and the driver Yanjmaa get married and settle down in the countryside. the colors of their lives are highlighted.