The old hidalgo Don Alonso Quijano, maddened by the excessive reading of books on chivalry and determined to become a famous and heroic knight-errant, leaves his village and sets out on the road in search of adventure, accompanied by his faithful friend Sancho Panza.
Currito de la Cruz's dream is to become a bullfighter. When he gets the chance to bullfight for the first time, he meets Carmona, a retired renowned bullfighter whom he manages to fascinate. As his protégé, Currito begins to be famous. At the same time, Currito falls in love with Rocío, Carmona's daughter, but his love is not reciprocated, because she loves Ángel Romera, another bullfighter.
Fearing that her niece Rosita will abandon her true love and enter into a marriage of convenience, doña Juanita tells her the story of when, many years ago, she fell in love with an accountant who worked in a circus.
