It is a love story like no other, which not only encompasses the most endearing Mexican traditions, but also ennobles one of the most representative icons from its culture: mariachi music.

The story begins when we meet Santos Martinez de la Garza, a young handsome and carefree millionaire, who owns a car distributor company.

At the same time, we meet Maria Mendoza, a humble, pretty and brave young woman who lives with her mother, Amalia, a widow; and her two younger sisters, Paloma, who is about to turn 15, and Isabel 8 years old.

And it is also in the "Ay Jalisco, no te rajes", run by Don Concho and his wife Lourdes, where the sweetest, saddest, most touching, comic and dramatic situations of the story will take place, together with Maria's inseparable friends who are members of the bar's mariachi band: "The Giant", Fernando: "The Casanova", who will turn into Santos´ confident and allied, "The Dreamer", "Susanito", "The Baritone", "The Adventurer " and "The Sparrow Hawk".

On the other hand, Maria will deal with Elvira's lies and tricks, Don Concho's daughter, who by whim and at any cost will not rest until she can have Santos.