Lucky Luke saves a curious character from being hanged. A man who thinks he's "Don Quixote" - after a fall from his horse. This fellow meets Milky, the true love of his life. After being swindled by a crook, this young girl works as a singer in a saloon. The deranged "Don Quixote" vows to avenge her. Fortunately, Lucky Luke decides to tag along, and tries every way he can to bring the poor guy back to his senses. After many narrow escapes from disaster, Luke finally succeeds in his mission… but not the way he expected!